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Full text of "Mining and Scientific Press (July-Dec. 1913)"

VOLUME 107 



JULY TO DECEMBER 
1913 





Mining and 


Scientific Press 


429 MARKET STREET 


SAN FRANCISCO, CALIFORNIA 



INDEX 



Page. 



Page. 

Abangares Gold Fields of Costa Rica 34, 206, 358. 

511, 666, 1032 

Company Report 442, 838 

Abt ontlaknon Mines. Ltd.. company report 595 

Abosso mine. West Africa 270, 892 

Acacia Mining Co., Colorado 830 

Accident prevention Editorial.... 955 

Rules, Copper Queen Co.'s mine, Arizona 634 

Accident Gold Mining Co., Subll mine. French Gulch, 

California 472 

Accidents, coal-mine in United States 864 

Compensation for 226 

Worklngmen's compensation Editorial.... 755 

Acid mine water 876 

Acidity, counteracting 750 

Acme mill. Sears' 128 

Adams, John Colt, death of 703 

Addlton. A. Sydney. .Under-estimating the cost of mill- 
ing plants — I. D. Ill, IV 88. 138. 263. 301. 620 

Administration and Mexico 386 

Ditto Editorial ... 366 

Advertising results of company meetings. .Editorial. ... 1 
Aerial tramway across Andes mountains. South America . 978 

Tramway. Irvlnebank 382 

Tramway, one-rope Editorial.... 41 

Tramway. Saline Valley Salt Co.. California 210 

Aerolites 876 

Africa, copper In Central 585 

Phosphate 501 

Agitation 154 

Slime H. B. Wright. ... 464 

Agitator. Dorr John V. N. Dorr 193 

Symmes P. G. Spllsbury . . . . 467 

Ditto Whitman Symmes.... 92 

Trent Donald F. Irvln ... . 821 

Ditto Walter Techow.... 385 

Agrlcola: an apreclatlon F. Lynwood Garrison.... 218 

On Assure veins 38 

Ahmeek Copper Mining Co., Kearsarge, Michigan 

635. 791. 991 

Dividend 34. 246 

Air-compressor. Sullivan angle-compound 

Fred D. Holdsworth 795 

Lift, design for an •. R. H. Shaw 861 

Pressure In smelting 145 

AJax Gold mining Co.. Colorado 870 

Mine. Victor, Colorado, electric mine-signal system.. 340 

Akin. A. D Olancho county, Honduras ... . 49 

Alabama, mineral production 167, 1018 

Alaska, Aleutian group 116 

Coal 742 

Distances to new placer districts 1028 

Fairbanks district output 1913 906 

Fairbanks district stamp-mills 945 

Fineness of gold at 341 

Glaciers 361 

Gold dredges 876 

Gold placer district, new 627 

Gold placer production 835 

Gold placers 876 

Gnldstream, No. 17 627 

Home rule In Editorial 41 

Hot Springs district output 1913 906 

Innoko and Idltarod districts 819 

Koyukuk-fhandalar region 160 

Lode mining in Interior Editorial.... 330 

Matanuska coalfields 793 

Metalliferous mining In 1912 355 

Mining lnws Editorial.... 

Nelchlna placer district 

Nome storm 588. 627. 699. 

Ditto Editorial 559. 710. 

Oil 

Ploner electric locomotives In 

Proper outfitting for trails, and government super- 
vision Editorial 

Railway construction Editorial.... 

Rock-drilling contests 210. 

Ruby district output 1913 

Ruby. Innoko. and Idltarod districts 

Shushana district 236. 355. 391. 627. 

Ditto Editorial 

Shushana district. Canadian Geological Survey report 

Shushana district, distance to 

Shushana district output 

Shushana-Glacler trail 

Tanana valley output 

Wagon-roads and trails 

Willow Creek district Editorial. . 

Willow Creek district, lode mining in 

Sumner S. Smith. . . . 
Winter work in A. E. Garvey, T. A. Rickard 

Alaska Free Gold Mining Co 

Alaska Gastlneau Mining Co 116 *184 

Ditto • . . . Editorial 

Alaska Gold Mines Co 

Ditto Editorial 

Preparatory Work of Grant H. Tod 

Suit regarding 

Alaska Gold Quartz Mining Co 

Alaska Juneau Gold Mining Co Editorial 

Plans of the F. W. Bradley. . . 

Alaska Mexican Gold Mining Co..l»9. 355, 627. 742 868 

Alaska Treadwell Gold Mining Co 199, 355. 627' 

r.,.. ••». 868. 

R ttn Editorial 

Dividend 

Electric locomotives 

Stamp-mill returns 

Alaska United Gold Mining Co 199,' 355. 627, 784. 

868' 

Albert Oil Shales. Sussex. New Brunswick . 

Aleutian group. Alaska 

Alex Scott mine. Butte. Montana 

Algeria, mining In*. 

Algomnh Mining On,, .ompanv r.-imr-r . . . " 
Alice mine v. Anaconda Copper Mining Co...... 



.471, 



699 
828 
797 
742 
918 

953 
86 
288 
906 
819 
945 
329 
507 

1028 
828 
966 
906 

1021 
330 

335 
110 
336 
391 
879 
541 
879 
184 
906 
336 
879 
880 
906 

906 
879 
1028 
918 
742 

945 
826 
116 
195 
891 
556 
865 



Alkaline cyanides, electrolysis of aqueous solutions of 

the simple . . .*. 927 

Solution, clarifying with basic lead acetate 516 

22 
109 
254 
448 
991 
170 
533 
890 



Alleghany district, California, geology of 
Allen, A. W- Colloids In ore dressing.... 

Ditto Simplification of gold-ore treatment.... 

Ditto Solution control in cyanidatlon . . . . 

Allouez Mining Co., Allouez. Michigan 635, 743, 791, 

Alloy, ellanlte 

Osmium-platinum, a new F. Zlmmermann 

Alloys, melting points of copper 

All-slimlng mill 136 

Alluvial gold 46 

Alluvlals, successful salting of C. S. Haley 1000 

Alta Berta Gold Dredging Co., California 357 

Alta Consolidated Mining Co., Utah 547 

Capital stock Increased 666 

Altman, Benjamin, legacy Editorial.... 674 

Aluminum 912 

H. D. Avis' patent for coating 306 

Industry 790 

Powdered 170 

Precipitation process : . 217 

Alunlte 443 

Alvarado Mining & Milling Co., Mexico 988 

Amador Copper & Gold Mining Co.. Montana 947 

Amalgamated Copper Co.. Butte, Montana 624, 865, 980 

Amalgamated Zinc (De Bavay), Ltd 381 

Company report 706 

American canyon. Humboldt county. Nevada, placer camp 373 

Enterprises In South America, and American manu- 
facturers Editorial.... 518 

American Electrochemical Society and American In- 
stitute of Mining Engineers, New York section 

meeting 865 

American Flreprooflng & Mining Co.. Wyoming, organ- 
ized 

American Flag mine, Utah 433, 437, 

American Institute of Mining Engineers and affiliation 
with Mining and Metallurgical Society of America 

Editorial 329, 

Butte meeting Editorial... 

Colorado section, meeting at Denver 

Ditto Editorial 

Iron and Steel section meeting 

Ditto Editorial. .. .518. 

Montana local section, meeting 825 

New York section, Joint meeting with American 

Electrochemical Society 865 

Spokane and Montana sections 785 

American Lead & Zinc Co.. Illinois , 

American Mining Congress Editorial... 

Philadelphia meeting 665 



1031 
987 



366 
.292 
824 
797 
662 
638 



202 
365 
696 

Resolutions 760 

American Smelters Securities Co 431 

American Smelting & Refining Co 431. 471 

Arsenic limit on Cobalt ores 782 

Dividend 398 

El Paso smelter 522 

Garfield plant 666 

Hayden smelter 524 

In Mexico 662, 

American Zinc. Lead & Smelting Co 197. 387. 

Amv-Matchless Mining & Milling Co.. Arizona, organized 

Anaconda, briquettlng of slime at 838 

Leaching process Montana.... 830 

Anaconda Copper Mining Co 

114. 166, 541, 542. 635. 786. 79'. 824. 825, 980. 901 

Dividend 641 

Geologic notes underground 940 

Nettie silver mine 824 

November copper production Editorial.... 877 

Smelter 659 



944 
474 

907 



Tropic shaft 980 

865 

980 



v. Alice mine 
v. Butte-Ballaklava Copper Co., 
ment 



amicable adjust- 



Pllot-Butte Mining Co 659 

Washoe plant 597, 634 

Anaklo sapphire fields of Queensland. .Lionel C. Ball. . . . 151 

Analyses, dikes on Rand 1011 

Of pyrrhotlte 126 

Analysis for constituents of zinc ores, combined method 

of Frank A. Bird 18 

Of black powder and dynamite 65 

Anantapur Gold Field, Ltd.. India 695 

Aji-ChI Ironfield C. Y. Wang 311 

Anchor Tin Mining Co.. Tasmania 616 

Company report 993 

Andesite. Tonopah Belmont mine. Nevada 288 

Aneroid barometer 126 

Anglo-French Exploration Co., company report 287 

Annalist. New York Times Editorial.... 798 

Annealing of gold 720 

Antelope Gold Mine, Ltd.. Rhodesia . . . 761 

Company report 286 

Anthracite, mining cost and profit 838 

Production. Pennsylvania 12 

Antimony gjo 

Imports Into United States , 250 

Aqueduct. Catsklll g4fi 

Aqueous solutions of the simple alkaline cyanides. 

electrolysis of 927 

Aramayo Francke Mines. Ltd.. Bolivia 896 

Arba Tin Mining Co.. Tasmania 615 

Ardmore Oil Co.. South Dakota, 1025 1031 

Are there Jobs enough to go around? 

F. Sommer Schmidt. .. ! 900 

Argentine, railways, federal ownership. .. Editorial. .. . 252 

Argonaut Mining Co.. v. Kennedy Extension Co 472 

Arizona metal production 78 

Mining industry 627 

Patent on mining claim 1028 

Arizona Commercial Copper Co.. Globe. Arizona 

„. 199. 236, 318, 906 

Mine A 653 866 

Arizona Copper Co.. Ltd.. Morenci.' Arizona." 279." 644.' 

627, 635, 683. 791. 868. 991 

Inspection department Editorial 86 

Powder explosion 984 

Smelter 623 



170718 



MINING AND SCIENTIFIC PRESS 



Pugc. 
Sit 

SJS 

7» 
. 779 



v. County of flrfnlM 

Arkansas. Blur, anil Ma.gs.nlne mountains 

IMntnonilt In 

Mtn.rul products 

Zinc or« deposits In Boon* anil Mnrlon counties.... 

Klrby Tliomaa. . . . 

Arrastre. an old 

Arsenic In United States 260. 

In Virginia 

Limit on Cobalt oroa. American Swelling & Runn- 
ing Co 7S_ 

Asbestos deposits, Urala B'js 

Production In Canada 

Production In United 8tntea !10. 



nr. t 

89S 
• 22 
14 



in 
f,r,:i 



Russia 362 



Virginia 



IS 



170 



759 
346 



911 



Ashantl mine, West Africa 892 

Gold production 270 

Aahbtirton Mining Co.. dredge, California 829 

Aaaay offlcc. United States at Helena. Montana 669 

Assnylng. tron-nall method 

\ ■ ■ il (Sold Mines. Ltd.. Western Australia, 236. 433. 

694. 835. 9 

Cobalt properties 626, 10.12 

Company report 286 

Costs at 327 

fynnldntlon 

Power-plant at M. W. von Bernewltz. . . . 

Associated Northern Blocks. Ltd.. Western Australia 

235. 433. 836. 

Victorious leases. Oro Banda. 235. 425, 433, 469, 694. 

626. 781 

Atbasar and Spnssky copper properties. Siberia 580 

Athnbnsca landing. Alberta, Canada, oil dtscovorv. 903. 1025 

Atkins. O. H Duty on cyanide salts 428 

Atlns mine. Tuttletown. Culifornfa 117 

Attorneys fees Editorial.... 481 

Auckland province. New Zealand, gold and silver pro- 
duction 494 

Austrnlla. Bendlgo, gold production 296 

Compensation Act 10" 

Copper production 78 

Peep mining In 

Mineral production 672 

Mines, ore reserves of 

Northern Territory, new mining ordinance 

Radium ores In 

Sydney Stock Exchange, new rule sr. 

Victoria, mining law in 



729 
693 
738 
655 
son 
32 



Zinc smelting In 



776 



Australian capital abroad 867 

Tin mine. Tasmania 

Austria coal mine fatality rate 

St. Joachlmsthal. radium from pitchblende 



616 
876 
463 

Automobile hoist 150 

Avis. H. D.. patent for coating aluminum 306 

B 

Babcock & Wilcox boiler 575 

V. Stirling boilers Hervey Gulick. ... 864 

Baffles H. N. Spicer.... 429 

Inclined L. B. Eames.... 503 

Ditto H. G. Nichols 823 

Ditto John E. Rothwell.... 194 

With slime settlement 70S 

Baia California, mining In 943 

Balaghat, Kolar, India 694 

Balaklala Copper Co.. California 161. 318. 435. 742 

And Field process, smelter fume S29, 984 

Hall process 62S 

Balaklala-Trlnity- Vulcan mines, Shasta count v. Cali- 
fornia W. H. Storms.... '40S 

Balance, hoisting In Editorial.... 920 

Baldwin- West inghouse locomotive 996 

Balkan mining Editorial.... 293 

War cost Editorial.... 213 

Ball. Lionel C.Anakle sapphire fields of Queensland. . . . 151 

Ball, Sydney H Sandstone copper deposits at Bent. 

New Mexico 132 

Balliet, Letson Counterbalancing hoists.... 936 

Balliot system of counterbalancing Editorial.... 920 

Baltic Mining Co., Michigan 590 

Banket Editorial. . . . 637 

Banks and profits of mining railway and industrial 

enterprises Editorial.... 954 

Banks, Charles A Dewaterlng tank.... 154 

Barnes. Corrin and E. A. Byler ....Relation of faulting 

and mineralization In Goldfleid 59 

Barnes-King Development Co., Montana, 118, 319. 474. 

513. 659. 908 

Barometer, aneroid 126 

Barrows, D. P. and President's Mexican policy 

Editorial 797 

Barstow mine. Colorado 628 

Barytes In Missouri 493 

Production in United States in 1912 36 

Basic-lined converter E. P. Mathewson . . . . 61 

Batopilas Mining Co., Chihuahua, Mexico. Company re- 
port 401 

Batterv, cam-shafts for a 838 

Bauxite 126 

Beaver Consolidated Mines. Ltd., Cobalt, Canada.. 354. 739 

Company report 556 

Beaver Gold Dredging Co., resoillng after dredging in 

California G. L. Hurst 719 

Beck Tunnel Consolidated Mining Co.. Utah 29 

Bedford. Robert H. and William Hague. .. .Rock-drill 

testing at the North Star 179 

Belcher mine, Gilpin county. Colorado 15;., 357 

Belgian furnaces in zinc smelting. . .George C. Stone, . . . 931 

Belgium, coal mine fatality rate 876 

Liege district coal mining 690 

Bell mine. Rhodesia 761 

Belt conveyors, material used in 978 

Belts, large driving 17 

Picking 750 

Bendigo. Australia, gold production 296 

Ben Hur Leasing Co., Washington 867 

Bennett, "Vyvyan C Lead salts In cyanidation . . . . 154 

Bent, New Mexico, sandstone copper deposits at 

Sydney H. Ball 132 

Bering river coal. Alaska Editorial.... 481 

Berwind-White Coal Mining Co., portable sub-station.. 1040 

Bewick, Moreing & Co., Western Australia 424 

Big business and industrial prosperity 

C. R. Van Hise 730 

Big Four Co.. High Grade region. California 661 

Big Pine property, Manhattan, Nevada 785 



M6 
106 



1 1 



946 

102H 



1021 
38 



F. 7 r> 
864 



991 



Utlllnajsley. Paul-' a«or|<«iown , . Puio- 

th« Southern C 40ilfl '\\" !r '* district and 

J 4 °«* Mlno, Montana 

ninKham Mines Co., nlnffhuP*. Utah 

Bird, Frank A Combined method of analyst* tor 

constituent!, of lino ores 

RUboo^ copper ores, Los Aniroloa Chambur of Minos' und 

Bishop Creek mine California.' cyanide" plant! ! 
lllamarck Consolidated Minos, Black Hills. South Dakota 

Bismuth In United 'states 5 ° 6, 66 °' Sgjf 

Tin-wolfram ores from Tasmania ift 

Rlnck-damp ^ 

Black Diamond, Alberta, Canada, oil discovery ! ! 903 

Black Hills, South Dakota, mineral production 820 

Mines 

Black Oil Mines & Mill Co., Tuolumne county. Call for - 

628 

Cyanidation 757 

Black Range, Western Australia 694, 655, '835 951 

Black Warrior, Gila county. Arizona ' 906 

Black water Mines. Ltd., Blackwater. New Zealand, Com- 
pany report ccr, 

Blaine county. Idaho, geology n,29 

Blanquler. Juan Nitrogen supplies!!!! 777 

Blust-hole drilling In open-pit copper mining .... 613 

Bloating, electric Charles S. Hurter 734 

Block Mines Co., Arizona oja 

Bluebell mine, British Columbia jbs 

Blue sky law. South Dakota 826 

Bolcza Gold Mines, Hungary 

Boilers, graphite useful In 'steam !!!!!! 

In reverberatory furnace flues, waste heat !. 

„ . S, Severln Sorensen. . . . 

Stirling v. Babock & Wilcox Hervey Gulick 

Boleo, Companle du Santa Rosalia, Baja California. 

Mexico 635 79^ „ 

Boleo Copper Co.. Mexico 358 

Boleo copper mine. California 430 

Bolivia, Aramayo Francke Mines. Ltd 896 

Diamond-drilling at Poderosa mine. .C. L. Severy. . . . 338 

Mineral exports 467 

Minerals In J00 

Railroads and transportation problems In 

G. W. Wepfer 100 

Railway ies 

Tin production 417 

Transportation problems in G. W. Wepfer.... 694 

Bonanza King ]61 

Bond. Marshall ... .Prospecting by the Government..!! 582 

Borax Consolidated. Ltd.. in Peru 75 

Borax production in 1912 324 

Boston & Idaho Mining Co., Boise basin. Idaho 590 

Boston & Montana Copper Mining Co 195 

Boston & Montana Development Co 388 

Railroad 542 

Boston-Butte Copper & Zinc Co.. formed 824 

Botallack mine 980 

Boulder No. 1. Western Australia 591. 835. 951 

Boulder Perseverance, Western Australia 594, 835, 95] 

Bouse & McMahon mine. Arizona 1028 

Boynton workmen's compensation act. California 

Editorial 755 

Braden Copper Co.. La Junta. Chile. 111. 315. 358. 624. 

635. 791. 827. 98S. 991 

Ditto Pope Yeatman 19 

Improvements 903 

Operations at 646 

Revised figures Editorial.... 1 

Stock advance 505 

Bradley. F. W.. gift to University of California, College 

of Mining Editorial.... 954 

Plans of the Alaska Juneau Gold Mining Co 880 

Bradley process Editorial.... 213 

Brakpan Mines Co., South Africa 432 

Brazil, Iron ores 750 

St. John del Rey mine gold output 679 

Brazilar y Anexas Co.. Baja California 944 

Breitung Mines Corporation : 120 



Brelich, Henry Geological survey of China. 

Brick, silica 

Bridge, John M Steel ore passes at Broken Hill. 

Brlquetting of slime at Anaconda 



976 
838 

773 
838 

Brlsels Tin & General Mining Co.. Tasmania 615 

Company report 37 

Britannia copper mine 159 

British carat 327 

Employer's liability act, results in 1912 

Editorial 599 

British Australian Oil Co., New South Wales 1018 

British Broken Hill Proprietary Co., Ltd., Company 

report 248 

British Columbia, cost of removing silt from harbors.. 443 
Kootenai-Boundary district, dividends paid by com- 
panies ' 910 

Sibolla Creek placer goldfield 697 

Slocan district 1032 

Smelting works at Grand Forks 733 

British Columbia Copper Co., Ltd.. Greenwood, B. C... 

30. 591, 635, 791, 871, 910. 991 

Dividends 358, 910 

British Guiana diamonds 581 

Gold output 581 

Ditto ' Editorial. ... 518 

British Western Isles, Ltd.. and Trinidad Oilfields. Ltd., 

Editorial 41 

Brokaw A. D Precipitation of gold by manganous 

salts 

Broken Hill field, New South Wales 314 

307 



Flotation at 

Metallurgy at J. Malcolm Newman. 

Mining methods at l->2 

773 
104 
175 
913 



Selective flotation at . . 

Steel ore passes at John M. Bridge.. 

Tailing and ore treatment at 

Zinc ores and flotation processes Editorial.. 

Broken Hill Gold & Copper Co., selenlte ores 
Broken Hill Proprietary Co., New South ^ ales, 
Australia 149, 4C1, 626, 634. 

Port Pirie plant 

Broken Hill Proprietary Block 14 Co., Company report. . 
Broken Hill South Silver Mining Co.. Australia. . 149. 661, 

Company report 

Bromine and salt, production In United States........ 

Bromo-cyanide process litigation Editorial.... 

Bronze, tobln .. ... 

Broomassie mine, West Africa ............... J. ID, 

Brown, F. C Pachuca tanks. . . . 976 

Brown' process decision Editorial.... 292 



1024 
776 
442 
773 
S36 
444 
407 
82 
892 



4 



MINING AND SCIENTIFIC PRESS 



Vol. 107 



948 
287 
948 
94 
4 
841 
856 
628 



241 
908 



700 



961 
349 



68 



Page. 

Browne, C. A. . . .Combination specific gravity bottle and 

dllatometer 348 

Ditto Cyanide from residue of sugar-mills 186 

Brunswick Consolidated G. M. Co., California 645 

Dividends 906 

Brunton. D. W... Mining problems and the Mining Con- 
gress 815 

Brushes for dynamos, graphite 918 

Bucket dredges and alluvial tin «_ 623 

Excavator scraper w 686 

Buckeye Belmont mine, Tonopab *. 288 

Drill efficiency 350 

Hoisting 936 

Buckhorn Mines Co., Nevada 831 

Progress at 462 

Buckhorn Mining Co., Idaho 28 

Buena Tlerra mine, Mexico 666 

Buffalo Mines. Ltd., Ontario, British Columbia 

243. 395. 548. 788. 

Company report 

Dividends 477. 

Buffalo Star dredge. Victoria. Australia 

Building a reduction plant Herbert Lang. . . . 

Bujun coal mines Editorial.... 

Coal mines in Manchuria Reljl Kanda. . . . 

Bull Moose Mining Co., Colorado 

Bullfinch Proprietary, Ltd.. Western Australia, 235, 433, 

468. 591, 655. 835. 911 

Company report 247 

Mill 217. 626 

Bullwhacker Copper Co.. Butte. Montana 212 

Bunker HIM ft Sullivan Mining ft Concentrating Co., 
Idaho 

Dividend 34. 246. 358. 398, 546, 743. 

v. Caledonia Mining Co.. extralateral rights. 201, 629. 
Bunker Hill Consolidated Mining Co.. Amador, Califor- 
nia, dividend 

Burbanks Main Lode. Western Australia. 235. 433. 594, 

655. 835. 

Burch. Albert Prospecting by the Government.... 

Burchard. Ernest F...Iron production In United States 

In 1912 

Bureau of Mines. Ontario 112 

Bureau of Mines. United States, and explosives 65 

And mine safety Editorial 954 

Hoisting cage, new 172 

Mine sanitation 106 

Portable electric mine lamps 328 

Safety electric switches for mines 262 

Burners, portable 962 

Burrage. A. C, v. Louis Ross suit 866 

Bush Tick Mines. Ltd.. Rhodesia 390 

Business and Industrial prosperity, big 

C. R. Van Hlse 730 

Conditions In United States 1026 

Butler. B. S...San Francisco district Beaver county. 

Utah 547 

Butte rhalcorlte. origin of Reno Sales 463 

District. Montana, electricity In 597 

Meeting, American Institute of Mlnlne Engineers 

Editorial 292 

Miners union and Houghton strike 389 

Mines rich In depth 470 

Ores, genesis of Editorial.... 446 

Strike 315. 320 

Butte-Alex Scott Conner Co.. Butte. Montana 28. 542 

Butte. Anaconda ft Pacific railway 659 

Electrification 83 

Butte & Ely Copper Co 79, 543 

And Consolidated Coppcrmlnes Co. merger 195 

And Glroux 506 

Butte ft London Copper Development Co.. Butte. 

Montana 218 

Butte ft Pensacola Copper Mining Co., Cascade county, 

Montana 8<>5 

Butte ft Superior Copper Co.. Butte. Montana, 29. 162. 

A * T*. ^ 1 . « 195 * 474 ' M 'j 630 ' 659 « 

And Elm Orlu Mining Co.. extralateral rights 24, 69 

And Minerals Separation 827 

Earnings So 

Flotation 865 

V. Minerals Separation. Ltd * 237* 903 

Ditto Editorial....' 

Butte Ballaklava Copper Co.. Butte. Montana 659. 

v. Anaconda Copper Mining Co.. amicable adjustment 

Butte Central Copper Co 386 388 

Reorganization 

Butte Daryumsu, Ltd.. Deer Lodge. Powell county, Mon- 
tana 

Butte-Duluth Mlnlne Co.. Butte. Montana. .2V.*659,"78V < 

Butte Mnin Range Mining Co., Butte. Montana 38 

And Tuolumne Copper Co 78 

Butte. Wisdom ft Pacific Railway Co 388 319 

Butters Charles Filter leaf natent. . . .' 935 

v. Golden Cycle Mlnlnc Co.. suit Editorial... 877 

Butters Snlvador Mines. Ltd.. Santa Rosa. Salvador. . . <m 

Buxton mine. South Dakota 315 

Bwana M'Kubwa copper mine. Northern Rhodesia **76 585 
Byler. E. A_. and Corrln Barnes. .Relation of faulting 

and mineralization In Goldfield . . 59 

Byler. E. A. and Lee W. Davis Topographic model 

of Cripple Creek district 144 

Byrnes. Eugene A., death of $31 



Caetanl. Gelaslo Hums*) side of milling 800 

Ditto Professional ethics 429 

Cage, new hoisting 17<> 

Calaveras Copoer Co 785 

Caledonia Mining Co. v. Bunker Hill ft * Sulil van M. ft 

c -, Co - extralateral rights 201. 629, 986 

California copper .* 779 

Dredging nt Xatoma M W. von Bernewltz! ! .' 1017 

Dredging at Snelllng ino" 

East Fork mining district 479 

Geologv and United States Geological Survey! .* 544 

Hlch Grade district 661 

Industrial materials of . , 207 

Mineral production 599 

™ tto • ■ ■ ■ • Charles G. Tale!!.'! 516 

Mineral resources. State Mining Bureau 

4 - _ _ Editorial.!!! 261 

Mot her Lode of W. T. Robinson 65 

Oil fields 356 

OH operations !.!!!!!!!!.!!! 906 

Oil production Uu 544 

OH production for 1913 J. H G Wolf ' 579 

Oil resources . . Editorial! ! ! . 559 

Quicksilver production 210 



173 
741 
980 
389 
786 

825 
825 



Page. 

Resolltng after dredging in G. L. Hurst 719 

Searles Lake potash deposits H. S. Gale.... 56 

Smelting at Campo Seco M. W. von Bernewltz. . . . 897 

Trinity county mineral resources 1029 

California Nevada Exploration Co., Chloride, Arizona... 784 

Calumet & Arizona Mining Co.. Warren, Arizona, 71, 199, 

. 508, 635, 683, 791, 904, 945. 991 

New Cornelia copper property, AJo, Arizona, 471, 527, 585 

Smelter . V 525 

Calumet ft Hecla Mining Co.. Calumet, Michigan. 586, 

590, 635. 743, 785. 791. 908, 991 

Accident compensation 226 

And American Federation of Labor 624 

Calumet dredge 818 

In California 508 

Lake Superior strike Editorial 174 

Mining Costs 82 

One-man drill and two-man drill 692 

Calumet ft Sonora of Cananea Mining Co.. Mexico. 30. 75. 

316, 359 

Cam shafts, breakages In 838 

Shafts for a battery 838 

Cam ft Motor, Rhodesia 381, 390. 761, 1027 

Camanche dredge, California 940 

Ditto C. G. Leeson 933 

Cambridge v. Commonwealth generator 626 

Camp Bird. Ltd.. Nicaragua 1033 

Camp Bird, Ltd., Ouray. Colorado 118, 237. 907 

And Its reinvestments Editorial 998 

Campo Seco, California, smelting at 

M. W. von Bernewltz.... 897 

Canada as an Iron producer Editorial.... 406 

Athabasca Landing. Alberta, oil rush 903, 1026 

Coal mining In western Editorial.... 599 

Mineral production 874 

Ditto Editorial 709 

Ontario. Accident statistics 746 

Dredges, new An occasional contributor.... 460 

Iron and steel Industry of Editorial. . . . 174 

Mt. Royal tunnel drilling 327 

Zinc smelting investigation Editorial 213 

Canada Iron Corporation. Montreal, Canada 389 

Canadian Consolidated Mining Co., dividend 548 

Canadian Copper Co., Canada 215, 238 

Canadian Klondyke Mining Co 460, 871 

And Yukon Gold Co.. dredge on Klondike river 988 

Canadian Mining ft Exploration Co. endowed prospect- 
ing Editorial 842 

Canadian Nickel Corporation, Ltd 238, 471 

Canal. Panama, excavation work at Cucaracha slide... 977 

Panama, concrete laid In locks and works 978 

Cananea Consolidated Copper Co.. S. A., Cananea, Sonora, 

Mexico 53. 238. 276. 471. 635. 667. 791. 827, 991 

Cananea, cost of reverberatory smelting at 522 

Smelter 526, 833 

Cancellation of patent 949 

Cape Colony diamond production 642 

Capital for mines and prospects, securing 

H. C. Cutler 822 

Carat. British 327 

Caribou-Cobalt Mines Co 623 

Carlsbad oilfield 119 

Carn Bren ft Tincroft mine. Cornwall 430, 505, 979 

Tailing 352 

Carnegie Coal Co. mine locomotives 996 

Carnotlte In Colorado 838 

Carpathia tin mine. New South Wales 867 

Carpenter. Jay A.. .Operation of West End mill, Tonopah 191 

Casamajor, Dr. Louis, manganese poisoning 

Editorial 42 

Case gasoline melting furnace 82 

Castle Dome. Arizona 781 

Catsklll aqueduct 846 

Cement production In United States In 1912 167 

Centennial Copper Mining Co., Calumet, Michigan. 2(6. 

635. 743. 791. 991 

Central states metal output 78 

Central Mining ft Investment Corporation, Rand, South 

Africa 515. 597 

Company report 513 

Surface operating costs 708 

Central Red. White ft Blue Co., Bendlgo, Australia, Com- 
pany report 993 

Central Zinc Co.. Ltd.. Company report 595 

Cerro de Pasco Mining Co.. Cerro de Pasco. Peru, 635. 

791. 991 

Ceylon plumbago 249 

ChafTers. Australia 468, 655 

Chalcedony. Nevada 793 

Chalcoclte. origin of Butte Reno Sales.... 453 

Original 134 

Chalmers ft Williams, tube-mill adjustable discharge... 1040 

Chambers-Ferland and Northern Concentrators. Ltd 826 

Champion lease. Benton. Wisconsin 982 

Champion Copper Mining Co.. Michigan 590 

Champion Reef Gold Mining Co., Kolar, India 694 

Charcoal to precipitate gold In cvanlde solutions 762 

Chartered ft General mine. Rhodesia 209 

Charters Towers, Queensland 372 

Gold and sliver production 854 

Goldfield 527 

Mineral production 1018 

Chase. Charles A. Mining schools and politics 427 

Chemical. Metallurgical, and Mining Society of South 

Africa Editorial 753 

Chemical reactions, role of pressure In 

John Johnston .... 501 

Chief Consolidated Mining Co.. Utah 119, 249 

Company report 325 

Chihuahua, mining conditions In western 936 

Chile. Iron ore deposits of Carlos Vattler 893 

Nitrate Editorial 482. 518 

Nitrate fields of Walter S. Tower 495 

Nitrate lands, sale of 36 

Northern Longitudinal railway Editorial.... 997 

Chile Copper Co 827, 866 

Ore reserves Increased 903 

Chilean mill data, slow-speed Erich J. Schrader 136 

Mills v. Hardlnge mills Robert Franke 223 

Chlllagoe Co., Ltd., Queensland. Australia, Company re- 
port 993 

China. An-Chl Iron field C. T. Wang 311 

And India, currency problems In the Orient 

_ „ Editorial 754 

And Japan, coal mining In 35 

As a tin producer 646 

Coke-making In 1013 

Geological survey of Henry Brellch 976 

Ditto F. Lynwood Garrison 735 



Vol. 107 



MINING AND SCIENTIFIC PRESS 



5 



Qoltl in i n ink in , 

Launching * republic Editorial. . . . 

Mining and metallurgical Induatrlea. ... Editorial. .. . 

Transportation Id 

Transporting coal In 

Chines* mine, hoisting at a 

Ditto M. W. von Bernowlti. . . . 

l inn. -*.' KnKlntM-rlnu * Mining Co . OOaJ MM 

Chlno Copper Co. Santa Rita. New Mexico. 65. 74, 119, 
621. Bit, 635. 791. 827. 903. 

Bonds 

Company report 385, 

Dividend 398. 

Christina* Gold Mining Co. v. John T. MUllken 

Chrome ore, consumption 

Chromlo Iron ore In United States 

Iron ore production In United States 

Chuqulcamato, metallurgical plant at Editorial.... 

Cla. Metalurslca de la Baja California 

Clengulta Consolidated Mines 

Clnco Mlnas mining camp and rebels, Mexico 

Cinderella Deep mine. Rand, South Africa 

Closed 

Cinematograph and mining 

Cinnabar. Nevada 

Cltliens Alliance and strike. Lake Superior region.... 

Editorial 

City & Suburban mill. Rand, precipitation of gold from 

cvanlde solutions on xlnc wafers 

Clark. H. H Portable electric mine lamps 62. 328, 

Ditto— Safety electric switches for mines.... 

Clark. Senator William A. 

Classifiers and sorting column 

Clay, plasticity of 

Clerc. F. L Psychology of zinc... 

ClifT Mining Co.. Michigan 

Clifton tin mine, Tasmnnla 

Coal. Alaska 

And lignite deposits, Idaho 

Area, Queensland 

Belgium. Liege district 

Bering river. Alaska Editorial 

Canada, mining In western Editorial 

China and Japan, mining In 

China, transporting 

Colorado 

Dutch East Indies, and oil and gold production 

Dust explosions, localizing 

Exports. Newcastle. New South "Wales 

India, production 

Japan, situation » 

Kentucky 

Manchuria, mine in, Bujun Relli Kanda.... 

Mine accidents and fatalities In United States. 652. 

864. 

Ditto Editorial 

Mines fatalities rates in foreign countries 

Mines, sampling 

Mines, use of gasoline motors In A. F. King 

Montana 

New Mexico 

New Zealand 819, 

Oklahoma, production In 1912 

Pennsylvania 404, 

Picking belts, Mitsui Co., Japan 

South Wales production 

Strike, Colorado 545. 664, 700. 740. 869, 

Ditto Editorial 

Strike, Colorado, and editors* resolution 

Editorial 797, 

Strike and referendum vote 

Strike and Sherman anti-trust law Editorial.... 

Submarine mine in Nova Scotia 

Taiwan production 

Texas, mining 

Virginia 15, 

Virginia, mining situation In western . .Editorial ... . 

Washington. Cowlitz River valley resources 

Cobalt as a steel alloy 

Bullion shipments 

In Virginia 

Oxide. Ontario 

Ontario. Willet G. Miller Editorial.. 

Desulphurizing silver ores at. .James J. Denny.... 

District, metallurgical research Editorial.... 

District, Ontario, Canada 

Milling at Fraser Reid.... 

Mines, royalties collected by Ontario Government... 

Ore shipments 739, 

Ores, arsenic limit A. S. & R. Co 

Ores, desulphurizing Editorial. . . . 

Ontario. Canada, production 112, 120, 

Ontario, silver, cobalt, and nickel, gold mines 

Silver industry, Canadian Mines Departments, inves- 
tigation 

Silver shipments 

Cobalt Lake Mining Co 

Dividend 

Cobar copper and gold field, New South Wales 

Coeur d'Alene mine-car Ulysses B. Hough.... 

District. Idaho 201. 241, 

District, ore deposits, genesis of Editorial. . . . 

District production of important properties 

Origin of lead, zinc, and silver in — I. II 

Oscar H. Hershey 489, 

Coeur d*Alene-Crescent Mining Co.. Idaho 

Coeur d'Alene Development Co. property valuation 

Coinage at United States Mints 

Coke, Alabama production 

In Illinois 

Making in China 

Production in United States in 1912 

Production of West Virginia 

Colbath, James S. ... Solution control in cyanidation . . . . 

Colburn, E. A., Jr Electric mine-signal system.... 

Coleman. A. P. .Nickel smelting by the Mond process. . . . 

Collier, A. J Coal resources, Cowlitz River valley, 

Washington 

Collierv disaster. Cardiff, Wales Editorial 

Colloidal matter In ores, lime action on 

Colloids and their importance Editorial. . . . 

In ore dressing A. W. Allen.... 

Colombia, emerald fields of F. P. Gamba. . . . 

Mining concessions 

Mining news 

Oil in Editorial 

Oil territory 

Oroville Dredging Co., Ltd., 34, 475, 510, 614, 910, 948. 

Colorado. Alma district 

Carnotlte in 



r.ig- 



519 
998 
268 

973 
137 
193 
1021 

991 
904 
831 
944 

870 
813 
331 
79 
43 
913 
237 
911 
198 
905 
904 
29 



657 
934 
362 
866 
515 
750 
63 
908 
616 
742 



ft 



Clear Creek county mines 

Coal In 1 

Cripple Creek, depth of shaft* !!'.!!'.!'. 714 

Cripple Croek district mines uj »o7 

Cripple Creek district ore production HI lit 

hatch' district 117 



590 
210 
690 
481 
599 

35 
973 

28 
310 
618 
901 
578 

31 
939 
856 

876 
954 
876 
580 
463 
28 
74 
1023 
340 
990 
750 
536 
907 
445 

842 
916 
954 
288 
893 
698 
898 

43 
548 
940 
987 

14 
1001 
754 
4S1 
214 
624 
216 
944 
910 
782 
483 
163 
662 

903 
321 
871 
317 
300 
805 
907 
518 
546 

529 
986 
241 
21 
103 
379 
1013 
38 
135 
582 
340 
413 

548 
599 
876 
87 
109 
345 
980 
120 
559 
1032 
980 
985 
838 



.-.hi 
030 
72 
849 

985 

554 
824 

797 



639 
539 
741 



Georgetown district, ore value In early days 

Gold discoveries near Collhran 

Gold production at Cripple Creek 

La Plata mountains Kensselnor H. Toll. . 

Lcadvlllc. unwuterlng Fryer hill underground work- 
ings 

Mine production In 1912, by counties 

Charles W. Henderson. . . . 
Mine taxation In 

pitto . ... Editorial:;;: 

Mlncrnl production 930 

Mines , 357 

Ouray, costs of driving Sunrise adit ......,......!! ! 399 

Platoro, new townslto 508 

Radium In , . 833 

Sllverton district shipments *3lV 473 

Strike of coal miners, 546, 689, 664. 700, 740, 830, 869. 907 

Ditto Editorial 446, 618, 673 

Strike and editors' resolution Editorial 797, 84" 

Strike and referendum vote 946 

Strike and Sherman anti-trust law. ... Editorial. ,, I 954 

Colorado Fuel & Iron Co.. Grant countv. New Mexico... 119 

Annual report 645 

Rouse mine payroll 754 

Colorado Gold Dredging Co 869 

Colorado Mining Co.. Company report 209 

Colorado State Schdol of Mines Editorial.... 131 

Columbia Copper Co m 

Columbia University, mining In Connecticut 

_ t . Editorial 877 

Combination specific gravity bottle and dllatometer 

C. A. Browne. . . . 348 
Combined method of analysis for constituents of zinc 

ores Frank A. Bird 18 

Combustion of liquid fuel Editorial.... 42 

Commerce Mining & Royalty Co 739 

Commercial failures in United States 951 

Commodore. Western Australia 594. 835. 951 

Common sense of the fume question 

Herbert Lang.... 341 

Ditto Charles L. Paige 

Commonwealth Gold Mines. Ltd.. Ontario 

Commonwealth Mining & Milling Co., Cochise county. 

Arizona 116 

Mine 434 

Commonwealth v. Cambridge generator 626 

Companla Minera Chontalpan y Anexas, Mexico, Com- 
pany report 37 

Companfe du Boleo. Santa Rosalia. Baja California. 

Mexico 635, 791, 991 

Company reports: 

Abangarez Gold Fields of Costa Rica 442 

Abbontiakoon Mines, Ltd 595 

Algomah Mining Co 556 

Amalgamated Zinc (De Bavay's), Ltd 706 

Anchor Tin Mining Co 993 

Anglo-French Exploration Co 287 

Antelope Gold Mine (Rhodesia) Ltd 286 

Associated Gold Mines of Western Australia, Ltd.... 286 

Batopilas Mining Co 401 

Beaver Consolidated Mines, Ltd 556 

Blackwater Mines Ltd 555 

Briseis Tin & General Mining Co.. Ltd 37 

British Broken Hill Proprietary Co., Ltd 248 

Broken Hill South Silver Mining Co 836 

Broken Hill Proprietary Block 14 Co 442 

Buffalo Mines, Ltd 287 

Bullfinch Proprietary (W. A.), Ltd 247 

Central Mining & Investment Corporation 513 

Central Red. White & Blue Co 993 

Central Zinc Co., Ltd 595 

Chief Consolidated Mining Co 325 

Chillagoe Co., Ltd 993 

Chino Copper Co 325 

Colorado Mining Co 209 

Compania Minera Chontalpan y Anexas 37 

Consolidated Gold Fields of New Zealand, Ltd 555 

Corbin Copper Co 402 

Dalv-Judge Mining Co 360 

De Beers Consolidated Mines, Ltd 706 

El Oro Mining & Railway Co., Ltd 836 

El Paso Consolidated Gold Mining Co 401 

Federal Mining & Smelting Co 247 

Franklin Mining Co 743 

Giant Mines of Rhodesia, Ltd 706 

Giroux Consolidated Copper Co 285 

Goldfleld Consolidated Mines Co 37. 206, 363, 744 

Great Boulder Perseverance Gold Mining Co 442 

Great Boulder Proprietary Gold Mines, Ltd 401 

Great Fingall Consolidated, Ltd 670 

Hampden Cloncurrv Copper Mines, Ltd 1037 

Horn Silver Mining Co 402 

Houghton Copper Co 555 

Hutti (Nizam's) Gold Mines, Ltd 442 

Iron Mountain Tunnel Co 442 

Isle Royale Copper Co 326 

Jupiter Gold Mining Co., Ltd 12? 

Kalgurli Gold Mines. Ltd 8J6 

Kerr Lake Mining Co 47S 

Kyshtim Corp.. Ltd 247 

Lahat Mines, Ltd 

Lake View & Star. Ltd Jg° 

Lonelv Reef Gold Mining Co »« 

Mass Consolidated Mining Co *'» 

Mayflower Mining Co °1;J 

Mclntyre-Porcupine Mines, Ltd «' 

Mexico Mines of El Oro, Ltd »« 

Mines Company of America ..... 
Montgomery-Shoshone Consolidated Mining Co 
Mount Bishoff Tin Mining Co. 



360 
248 
836 



Mount Elliott. Ltd T-'hli 

Mount Lyell Mining & Railway Co.. Ltd 10.il> 

Mt. Morgan Mining Co.. Ltd 

Muro Magnetic Co.. Ltd 2,2 

Nevada Wonder Mining Co. = 

North Broken Hill Mining Co., Ltd 360, 993 

xT„..*-h T2,i*to ivrinlner Co 



595 



North Butte Mining Co. 

Offln River Gold Estates c , n 1017 

Oroville Dredging Co., Ltd 670, 1037 

Otavi Mines & Railway Co. ........ . & |° 

Ouro Preto Gold Mines of Brazil. Ltd |U 

Poderosa Mining Co.. Ltd £»' 

Prestea Block A., Ltd »<" 



6 



MINING AND SCIENTIFIC PRESS 



Vol. 107 



Page. 

Company reports: 

Prince Consolidated Mining & Smelting Co 550 

Progress Mines of New Zealand. Ltd 555 

Ray Consolidated Copper Co 326 

Rhode Island Copper Co. 555 

Rooiberg Minerals Development Co.. Ltd 993 

St. John del Rey Mining Co.. Ltd 360 

St. Mary's Mineral Land Co 613 

Scottish Gympie Gold Mines. Ltd 993 

Shamva Mines, Ltd j% 286 

Shannon Copper Co % \. 325 

Siamese Tin Syndicate, Ltd 837 

Silver King Coalition Mines Co 168 

Simmer Deep. Ltd 286 

South Utah Mines & Smelters 442 

Spassky. Copper Mine, Ltd. 125 

Stewart Mining Co 478 

Superior & Boston Copper Co 993 

Talisman Consolidated. Ltd 325 

Tanalyk Corporation, Ltd 837* 

Taquah Mining & Exploration Co., Ltd 993 

Tekka. Ltd 125 

Transvaal Gold Mining Estates, Ltd 670 

Trl-Bulllon Smelting & Development Co 402 

Troltzk Goldflelds, Ltd 595 

Tronoh Mines. Ltd 80 

Utah Copper Co 326 

Village Main Reef Gold Mining Co 478 

West End Consolidated Mining Co 209 

Winona Copper Co 556 

Yukon Gold Co 80 

Zeehan-Montana Mine, Ltd 287 

Zinc Corporation, Ltd 168 

Compensation Act. Australia 105 

For accidents 226 

Law. workmen's. West Virginia Editorial . . . . 517 

Worklngmen's Editorial 755 

Comstnck-Phoenlx Mining Co.. Virginia Citv. Nevada.. 357 

Comatock Pumping Association 119 

Comstoek. pumping at A. M. Walsh 305 

Concentrate In collecting boxes drained 876 

West End mill. Tonopah / 210 

Concentrating plants. Missouri 196 

Concentration 479 

And power for the Mt. Morgan mine 296 

Edison process Editorial 482 

Concentrator. McQuisten tube -. 195 

Concrete laid in Panama canal locks and works ' 978 

Condenser. Jet and surface results 671 

Conlagas mine. Ontario 982 

Conservation Congress. Fifth National Editorial 753 

Consolidated Arizona 783 903 

Consolidated Copper Mines Co., Ely. Nevada. 29. 111. 163. 

636. 745. 791. 991 
Consolidated Copper Mines Co. and Butte & Elv Copper 

Co. merger 196 

And Ely Central Copper Co 741 

Consolidated Gold Fields of New Zealand. Ltd.. Com- 
pany report 555 

Consolidated Gold Fields of South Africa 237 

Company report 883 

Selective mining H. H. Webb 860 

Consolidated Mining & Smelting Co.. British Columbia. . 158 

Dividend 34. 910. 1032 

Consolidated Virginia property, Comstoek. lowering 

water-level Editorial.... 953 

Consolidated Willow Mining Co.. California 829 

Continental Mining Co. and Tonopah Mining Co 114 

Continuous replacing machine 172 

Converter, basic-lined E. P. Mathewson 61 

Practice, development of Herbert Haas.... 653 

Co-operation and formation names 819 

Copper 92 

Alaska 355 

Alloys, melting points of 890 

And flotation processes In United States 

Editorial 175 

And gold Held. Cobar. New South Wales 300 

And wet assay 793 

Belt. Shasta county. California 408 

Blister, cost of producing. Mt. Lyell. Tasmania 1021 

California 779 

Deposits at Bent, New Mexico, sandstone 

Sydney H. Ball 132 

Deposits. Russia 623- 

District. Lake Superior 126 

Exports Editorial 798 

Exports of United States 363 

Famine 783 

From mine water 854 

In Central Africa 585 

In Germany 386 

Leaching at the Nevada-Douglas property 127 

Market Editorial 329 

Market and Lake Superior strike 246 

Market. New York 122. 505 

Matte and base bullion from an electric spelter fur- 
nace E. W. Hale .... 974 

Mines. Lake Superior 112 

Mines. Lake Superior region map 275 

Mining, blast-hole drilling in open-pit 643 

New. York and Lake Superior strike 195 

Ore oxidized, leaching with sulphuric acid 523 

Ore, treatment bv leaching at Chuquleamatft ....... 

Editorial 43 

Ores. Blsbee. Los Angeles Chamber of Mines and Oil. 946 

Ores, electric smelting of 355 

Ditto Editorial 675 

Ores, electric smelting of 

Dorsey A. Lyon. Robert M. Keeney. . . . 976 

Ores, furnaces for smelting Editorial.... 517 

Ores In 1912 707 

Ores, leaching of John Rooke-Cowell. . . . 294 

Placer deposits 135 

Production. Australian 729 

Production in United States In 1912 Editorial 954 

Production. July 246, 285 

Production. June 77. 167 

Production, monthly 634. 791. 991 

Production of Arizona 78 

Production of Australia 78 

Production of Nevada 313 

Production of Ontario 982 

Production of Taiwan 898 

Production of Utah In 1912 665 

Production of the world 123. 260 

Situation 285 

Ditto .' Editorial 639 

Smelting, slag losses In Editorial.... 330 



m Page. 

Smelting practice In the Southwest 

Thomas T. Read 521 

World production In 1911 nnd 1912 916 

Copper Hill mine, Colorado, Incorporated 829 

Copper King, Chewelah district. Washington 832 

Copper Mountain Mining Co., Vancouver Island hold- 
ings 832 

Copper Producers' Association report. "7. 281. 439, 476, 

594, 790. 950 

Copper Queen CoAolidated Mining Co.. Blsbee. Arizona, 

635. 663, 791, 945. 991 

Accident rules 634 

Gas trouble at Holbrook shaft 160 

Pension system 868 

Reverberatory furnaces, dust-chamber 978 

Smelter 628 

Smelter, handling flue-dust at the 

James Douglas. .. . 929 
Copper Queen Mining & Milling Co., Ltd. and Reindeer 

Copper & Gold Mining Co.. Coeur d'Alcne. Idaho. . 72 
Copper Range Consolidated Mining Co.. Palnedale, 

Michigan 590. 635. 743. 786. 791. 991 

Corbln Copper Co • 659 

Company report 402 

Gambrinus claims 908 

Core-drilling, use of steel points for 194 

Corinthian North, Western Australia 626. 655. 781 

Mill 235. 469 

Cornish mines. Xlssen and ordinary stamps 695 

Mining, Geevor tin mine discussion by Horace G. 
Nichols, London Institution of Mining and 

Metallurgy 979 

Cornwall, electric smelting of tin ore 578 

Coronation Mines. Ltd.. British Columbia 277 

Corporation tax. decision of Supreme Court 

Editorial 877 

Cortez Associated Mines Co 666 

Cost at Associated mine. Kalgoorlie 327 

At Buckeye Belmont mine. Tonopah 288 

At El Oro mine. Mexico 693 

At the Great Fingall mine 732 

At Holllnger mine. Porcupine 554 

At Lake View & Star mines 181 

At the Oriental Consolidated Mines... 932 

At the Oroya Black Ranee mine. Western Australia. 934 

At the Standard Consolidated, working 

Edward H. Nutter 312 

At the Yuanmi mine. Western Australia 892 

Average working on Rand ■ ■ . . • 182 

Balkan war .Editorial 213 

Keeping, mine C. M. Eye 261 

Milling, at the Chino 522 

Milling. Nevada Wonder mine • • • 940 

Mining, at West End. Tonopah 210. 272 

Of driving Sunrise adit. Mountain Top Mining Co., 

Ouray, Colorado 399 

Of electric power. Spain .. ... •• 126 

Of handling slag. Grand Forks smelter, British 

Columbia _■ •■■ ■ • ■ ■ • • 

Of milling plants, underestimating, LTI in, I\ . . . . . 

A. Sydney Addlton 88. 138. 263. 301. 620 

Ditto Algernon Del Mai*.... 777 

Ditto ... ■ Editorial.... 291 

Ditto Charles T. Hutchinson. . . . 349 

Of mining deep leads. Victoria. Australia 79 

Of operating. North Broken Hill mine 940 

Of power at Kalgoorlie • "J 

Of producing blister copper, Mt. Lyell. Tasmania... 1021 

Of removing silt from harbors, British Columbia 443 

Of residue disposal. Kalgoorlie 'J2 

Of reverberatory smelting at Cananea 

Of shaft sinking. Nevada Wonder mine 9U£ 

Of stope Ailing Simmer & Jack mines. Rand 9ȣ 

Of sulphur production .......... | 

Surface operating Central Mining & Investment Co.. 708 

Zinc Corporation. Ltd yy'AAi" ■-V. 'Hi' ViV 

Costa Rica, Abangarez goldflelds, 34, 206, 358, 442. 511. 

Cottrell electrical precipitation process 557 

Counterbalancing hoists »°5 

Cox. Jennings Stockton, Jr.. death of j'» 

Crescent mine, Manhattan. Nevada J;7 

Cripple Creek district. Colorado, depth of shafts at <34 

o™%roa»cu™ ::::::: m." «# 907 

Leasing and low-grade milling at ,„ 

Stephen L. Goodale.... 297 

Topographic model of j ? • %i? *■. ... 

v E. A. Byler and Lee W. Davis.... 144 
Crosslev suction gas-engines at Central Red. White & 

Blue mine. Bendlgo .... _• • • • 

Crown mill. Karangahake. New Zealand, cyanidlng on 



708 



commercial scale 



978 



i ' , 1 1 1 1 1 1 '. i 1 1 1 1 ... 

Mine New Zealand «i 

Crown_M!nes Co., and Klmberley system of mining. 



Rand 



1?. 



870 
154 
757 
484 



Equipment at i 

Crown Point Mining Co.. Gold Hill. Nevada 3*7 

Crown Reserve. Cobalt Ontario. Canada 

And Porcupine Crown property. . . . .... . .. . •!!§■ iSS 

Dividends ; 195, 354. 431. .02. 825 

Crusher, sampling ore from a rock ?'» 

Crushing underground, ore j"" 

Cuba, mining Iron ore in 

Cucaracha slide. Panama, work at J'' 

Culebra cut. flooding Panama canal «» 

Currency problems In the Orient Editorial.... 754 

Cutler. H. C... Securing capital for mines and prospects Xit 

Cuyun'a Iron range. Minnesota . . • • ■•■ 

Cvanldation, lead salts in Vyvyan C. Bennett. 

• Ditto M. W. von Bernewltz. 

Nlplssl'ng mill. Cobalt 

Of Cobalt ore • • • • • • ■ - vii 

Solution control In ...A. W^ Allen.... 448 

Ditto James S. Cnlbath 582 

Cvanlde from residue of sugar-mills . .C. A. Browne 186 

' Plant Tlntle district. Utah • J«f 

Plants, design for an air-lift R. H. Shaw 861 

Precipitate, smelting ... '25 

Salts, duty on G J1 H ;, A i klns *?? 

Solutions, electrolysis of Edward F. Kern.... ill 

Solutions, retardation phenomena In the solution or 

gold and silver in aqueous 889 

Cyanides, electrolysis of aqueous solutions of the sim- 
ple alkaline • 927 

Of potassium and sodium on free list .. Editorial ... . 517 
Cyanidlng on commercial scale. Crown mill. Karanga- 
hake. New Zealand 978 



Vol. 1«»7 



MINING AND SCIENTIFIC PRL.SS 



7 



Page. 

Daly-Judge Mining Co.. Company report 160 

Dividend! »87 



Daly Mining C. 

In( Co. 



and Weat Ontario Connollilulrd Mln- 



746 



Dan Cr««k Mining Co. 699 

Davcy. William It., doath of 431 

Davis. Lea W. and E. A. Bylar — Topographic modal of 

Cripple Creek dlatrlct 144 

Dnvla-Daly Copper Co. Montana 114, 581. 866, 980 

Day. David T Petroleum production In 1911 633 

Daylight Mining Co.. Missouri S.Til 

Dayton Petroleum Co 119 

l>»-a«lwo..,| iif.*.iy ..III. .-. (iun*|„.i tntlon .'burge* on lull. 

lion 826 

lv.i.iw l i;u-.in- .sh t'hiit un.i H. i.i. ii. . rn luis .ss t'luii 

IV lluv.iy v Mliwritls Sop.u .it I, .ii pro. --us 

Wilton Shollahonr 31 

IV n.'. rs Consolidated Minos. I.t.l , Company n-port . . Tor, 

Decimals and void value Editorial.... 84 2 

Deep mining: In Australia 693 

Delator No. 3 slime tables speod 902 

De Kalb. Courtenay — Revision of tho United States min- 
ing; laws 778 

Del Mar, Algernon — Underestimating; tho cost of mill- 
ing; plants 777 

Denny, H. S.. An English view of Mexican conditions. . . . 735 

Ditto Selective mining; and future outlook.... 383 

Denny. James J Desulphurizing silver ores at 

Cobalt 484 

Denver A Salt Lake Railroad Co, Moffat tunnel 740 

Departments, mining and the Editorial.... 842 

Depth of shafts at Cripple Crook 734 

Desert Power & Mill Co.. and Tonopah Mining Co., v. 

Joseph A. Vincent Editorial.... 292 

Design for an alr-llft R. H. Shaw 861 

Desulphurising Cobalt ores Editorial.... 483 

Process In cyanldatlon 217 

Silver ores at Cobalt James J. Denny.... 484 

Detonator, preparation of primers 975 

Detroit Copper Mining Co.. Morencl, Arizona. 160, 635, 

791, 991 

Smelter 524 

Development of converter practice .Herbert Haas. . . . 653 

Dewnterlng tank Charles A. Banks.... 154 

Wheel for pulp 339' 

Diamond drilling at Poderosa mine. Bolivia 

C. L. Sevcry 338 

Production, Union of South Afrfcn 612 

Diamonds and other gems mined In United States 94 

British Guiana 5S1 

Cutting 82 

In United States 79 

Dllatometer and specific gravity bottle, combination.. 

C. A. Browne. . . . 348 

Directors, dummy Editorial.... 85 

Disease and sanitation In new countries. .Editorial. .. . S77 

Dislodging slime cakes from filter media 935 

Dividend disbursements Editorial.... 42 

Diving apparatus. Neptuno 128 

Divining rod In Germany Editorial.... S42 

Doak, Ferguson, death of . -. 244 

Doctor-Jack Pot Mining Co., Colorado 907 

Doe Run Lead Co. and St. Joseph Lead Co., consolida- 
tion 17, 586 

Dolcoath Mine, Ltd.. Cornwall, England 352, 430, 505 

Moving pictures 904 

Dolores mine 164 

Dome Lake Co.. Ontario 197. 388. 431, 504, 624 

Change of owners 903 

Controlled by Temiskaming & Hudson Bay Mining 

Co 904 

Mill 1032 

Dome Mines Co.. Ltd., Porcupine 159, 780. 825, 982, 1026 

Dominion Nickel Co 238 

Donaldson, Francis. . . .Sinking and lining of shafts. . . . S44 

Dorr agitator 94 

Dorr. John V. N Dorr agitator.... 193 

Dos Estrellas, Mexico, cyanidation 759 

Doubtful leadership of labor Editorial.... 798 

Douglas. James. . Handling flue-dust at the Copper 

Queen smelter 929 

Douglas Coppery Co 196 

741 



Dow. Stephen R.. case 

Drag line scraper bucket 685 

Dredge. Alta Bert Gold Dredging Co., California 357 

Australia 156 

94 
SIS 



Buffalo Star. Victoria. Australia 
Calumet & Hecla Mining Co. 



Camanche, California 940 

Ditto C. G. Leeson 933 

Disposal of gravel, soil, and sand from 876 

Mining, Victoria, Australia 479 

Oroville Dredging Co., California and Colombia, 34, 

475, 510, 910, 945, 91S, 980 

Philippine Islands 120 

Sumpter * 119 

Timber members of 876 

Tin Cup Gold Dredging Co., Gunnison county, Colo- 
rado 117 

Dredges 588 

Gold, Alaska 876 

Gold Coast of West Africa 890 

New Canadian An occasional contributor.... 460 

New Zealand goldfields 479 

Paracale district, Philippine Isalnds 780 

South Island, New Zealand 729 

Dredging, Alaska 71 

At Natoma, California. .. .M. W. von Bernewitz. . . . 1017 

At Oroville 669 

At Snelling. California 1002 

Breckenridge district, Colorado 869 

By hand in Siberia John Power Hutchins.... 813 

Colombia 475 

Companies. Oroville merger 663 

Gold, South Island, New Zealand 1023 

In California, resoiling after G. L. Hurst.... 719 

Operations, prospecting gravel for 902 

Oroville, California 279, 700 

Panama canal 48. 288, 306, 977 

Philippines by Australian companies 1033 

Resoiling after. Australia 494 

Shasta county. California 280 

Victoria in 1912. Australia 528 

Drill efficiency at Buckeye Belmont mine 350 

Jack Augur, Mesaba Range, Minnesota 1024 

New 918 



Page. 

One-man ftj 

Testing machlno at North Star 17» 

Drilling contest* 11, 108, 210, 118, 437 471, lit 

Conteslk, machlno Editorial..., 1 

Equipment at Ml. Royal (go 

In mld-alr C. M. Hansen 111 

In opon-plt coppor mining, blust-holo 643 

Drills In the Wltwatorsrand. hammer 619 

Sloping at Sudbury, Ontario Albert E. Hall.... 110 

Drumlummon Interosts and St. Louis Mining Co 114 

Drummond Fraction, Cobalt 948 

Dry lako theory of salt deposition 176 

Ditto Editorial 173 

Dummy directors Editorial.... 86 

Duncan patents, treatment of slime In cyanide mills... 29 

Dunn. Russell L., Revision of mining law, protest 

Editorial 637 

Dust chambers, recovery of dust 978 

Dutch East Indies, Sumatra. Ketahoen mine wages.... 940 

Oil, gold, and coal production 310 

Tin oxports 210 

Dutch Guiana, gold In Surinam 1020 

Dutch mine, Quartz. California 628 

Duty on cyanide salts G. H. Atkins.... 428 

Dynamite and black powder, analysis of 65 

Frozen 1021 

Dynamos, graphite brushes for 91 8 



Eagle & Blue Bell Mining Co., Utah 54". 

Dividend 

Eagle district, Colorado 117, 

Eames, L. B Inclined bailies.... 

Earth, Infusorial 

East Butte Copper Mining Co., Butte, Montana, 241, 317. 

320. 431. 635, 669, 791, 824, 

East Fork mining district. California 

East Rand Proprietary mines 

Ebner property, Alaska Editorial.... 

Ecuador, sanitation loan for Guayaquil. . .Editorial ... . 

Edison process of concentration Editorial 

Edna May, Western Australia 694, 655. 835, 

Educating the public regarding mining. .Editorial. .. . 

Education that educates Editorial.... 

Edwards, W. W Steel sluiceway linings.... 

Eldorado Banket mine, Rhodesia, milling operations at. 

Eldorado Canyon area, Nevada 

Eldorado mine, California 

Rhodesia 

Electric blasting Charles S. Hurter.... 

Furnaces, possible applications to Western metallur- 
gy Dorsey A. Lyon, Robert M. Keeney.... 

Hoist. Inspiration Consolidated Copper Co 

Lamp, portable 

Lighting, reduced watt, use Editorial.... 

Locomotives in Alaska, pioneer 

Mine lamps, portable H. H. Clark 62. 328, 

Mine-signal system E. A. Colburn, Jr 

Power, Spain, cost in 

Smelting of copper ores 

Ditto Editorial. . . . 

Ditto Dorsey A. Lyon. Robert M. Keeney..., 

Smelting of tin ore 

Spelter furnace, copper matte and base bullion from 
an E. W. Hale. . . . 

Switches for mines, safety H. H. Clark.... 

Time fuse E. Le Roy 

Traction, Italy 

Electricity in Butte district, Montana 

Electrolysis of aqueous solutions of the simple alkaline 
cyanides 

Of cyanide solutions Edward F. Kern.... 

Electrostatic separation of ores. Huff method 

El Favor Mining Co., Jalisco, Mexico 

Dividend 

Elianite 

Elkton Consolidated Mining & Milling Co.. Cripple 

Creek, Colorado, dividend 357, 743. 

Elm Orlu Mining Co., Montana 470, 

And Butte & Superior Copper Co 

Extralateral rights 

Elmore and Minerals Separation litigation 

El Oro Gold Dredging Co., California 829, 

El Oro Mining & Milling Co., Colorado 201, 743, 

Carbonate Queen claim 

El Oro Mining & Railway Co., Ltd., Mexico 359, 548. 

Company report 

El Oro mine, Mexico, costs at 

Mill, cyanidation • •-• 

El Paso Consolidated Gold Mining Co., Victor, Colorado, 
dividend 

Company report 

v. R. A. C. Peterson 

El Paso Extension Gold Mines Co., Colorado, incor- 
porated •••• 

El Tigre Mining Co., Sonora, Mexico 59 J, 

Cyanidation 

Ely, Fred B Mining experts and practical men 

Ely Central Copper Co. and Consolidated Copper- 
mines • ■ • • ■ ■ - • • ■ • • 

Emerald fields of Colombia F. P. Gamba 

Empire Mines Co. endowed gold mine 

Empire Zinc Co., Cleveland claims, Pinos Altos district. 

New Mexico 

Energite Explosives Co., suit for damages 

Engineering Congress, International Editorial.... 

Engineers and geologists again Editorial 

Engineers' Club. San Francisco, new quarters..... 

Editorial .... 

English view of Mexican conditions. . . .H. S. Denny. . . . 

Enterprise property. Trinity county, California 

Equipment at Crown Mines 

Ernestine Mining Co.. New Mexico 

Esperanza, Ltd., Mexico 

Company report 

Cyanidation 

Ethics, professional G. Caetani.... 

Ditto Victor G. Hills.... 

Ditto J- M. Lilligren . . . . 

Eucalyptus oil, manufacture of 

Eucalyptus Oils. Ltd.. New South Wales 

Eureka T. & T. hook 

Evje nickel mine, Norway 

Excavator, Shearer & Mayer 

Excursion to North American smelting works 

Ferdinand Heberlein . . . . 
Experiments on basic lining. Great Falls plant 



871 

236 
155 
503 
250 

991 
472 
982 
879 
841 
482 
951 
560 
7 11 8 
852 
684 

29 
392 

79 
734 



160 
328 
405 
IMS 
934 
111 11 
126 
355 
675 
976 
578 



974 
262 
972 
126 
597 

927 
577 
708 
910 
202 
170 

907 
903 
24 
69 
941 
868 
869 
629 
911 
836 
693 
759 

743 
401 
506 

870 
702 
759 
583 

741 

345 
842 

909 

782 
213 
921 

798 
735 
700 

13 
316 
.151 
980 
759 
429 
976 
821 
382 
3 82 
1 28 

35 
685 

713 
61 



8 



MINING AND SCIENTIFIC PRESS 



Vol. 107 



Page. 

Exploration Co., Tomboy mine, Colorado, and share- 
holder 905 

Explosions, localizing coal-dust 618 

Explosives and Bureau of Mines 65 

Frozen , 102X 

Mine, liquid air and liquid oxygen In Germany 210 

Exposition, mining and the big J. Nelson Nevlus 502 

Extension mine, Tonopnh 665, 702 

Extinguisher, J-M Fyro, fire .... & '. . . 1040 

Extralateral rights G. H. Stone 820 

And the courts Editorial 85 

Decisions 211 

Montana suit In 281 

Bye, CM. Mine cost keeping 261 



Gale, H. S Searles lake potash deposits 

Gale, Hoyt S.j and Charles G. Tale Borax production 



Page. 
56 



Fairbanks district. Alaska, output 1913 

Stamp-mills 

Falcon mine, Rhodesia 381, 761, 

Fault phenomena Editorial 

Faulting and mineralization In Goldtield. relation of . . . . 
_ . Corrln Barnes and E. A. Byler.... 

Federal workmen's compensation law Editorial 

Federal Lead Co., No. 11 mine, Myers-Whaley shoveling 

machine 

Federal Mining Co.. Gem. Idaho 

Federal Mining & Smelting Co.. Wallace. Idaho, 358. 386. 

471, 

And McQulsten tube concentrator 

Company report 247 

Dividend 

Earnings 

v. Headlight Co !!!!!!!!!! 

v. Washington Water Power Co '. 

Federated Malay States, tin and wolfram exports 

Feldspar, Virginia 

Fenian mine. Western Australia, 235, 433, 594, 655. 835 

Ferberlte 

Ferrochrome ..!!!! 

Fertilizer, sulphur as 

Fldalgo-Alaska Copper Co !!!!!!!!!! 

Field process, smelter fume and Balaklala Copper Co... 

Filter leaf patent Charles Butters. 8 ." 9 .' 

Media, dislodging slime cakes from 

Patent, bought by Charles Butters 

Patents Editorial 

Presses, wet-crushing treatment plant 

Fineness of gold at Fairbanks, Alaska 

Flnlay, J. R. Output of gold 

Fire extinguisher, J-M Fyro 

Fireplace, a good J. D. Hubbard! ! 

Fires, preventing the spread of flames 

First National Copper Co., California 236 

And Hall sulphur process Editorial.. 

First National Gold Mining Co. organized 

Fissure veins, Agrlcola on 

Flame-test apparatus, Haldane !!!'.! 

Flaxie mine, Nevada 

Flooding Culebra cut, Panama canal ..!...!!!.'!!!'"' 

Florence mine. Goldfield, Nevada 59' 

Florida, phosphate in " ' 

Flotation at Broken Hill 

Discussion. Mining and Metallurgical Society. ....... 

Mineral . Wilton Shellshear 

Of sulphides from ores 

Plant, Zinc Corporation. Ltd 

Process, oil 

Processes ... Editorial '. '. 

Processes and Zinc Corporation 

Selective Editorial..!'. 

Selective, at Broken Hill, New South Wales 

Flue-dust at the Copper Queen smelter, handling 

„, ., .... , James Douglas. . 

Mixed with converter slag Editorial 

Fluorspar production In United States In 1912 

Forest Service H. W. Reed. 

And the miners Editorial!!!! 

Forestry Service E. A. Sherman 

Forests, national, timber sale, Lawrence county South 

Dakota 

Formation names and co-operation 

Fourth of July Editorial.!!. 

Fox. H. W. and H. F. Lunt Hlllabee gold mine. 

Alabama 

France, coal mine fatality rate 

La Lucette mine, passing of Editorial.. 

Franckelte 

Franke. Robert. .. .Hardlnge mills v. Chilean mills!! 
Franklin Mining Co., Demmon, Michigan, 281, 635, 791 

Company report 

Franklin Furnace zinc mines. New Jersey production'' 
Frasers mine. South Cross. Western Australia. 70. 235 
Free, E. E... Progress In potash prospecting In Railroad 

Valley, Nevada 

Free Coinage Gold Mining Co.. Colorado ! 

Fremont Consolidated. California, dividend 

French Flag mine, Colorado 742, 

Frenier pump 

Frue vanners 

Fuel. gas. liquid, solid Editorial.... 

Utilization, progress in Editorial.... 

Fuller's earth 793, 

Fume question, common sense of. Herbert Lang. ...341, 

Ditto Charles L. Paige 

Question, smelter Editorial.... 

Sumitomo copper smelter 

Furnace, copper matte and base bullion from an electric 
spelter E. W. Hale 

Flues, waste heat boilers in reverberatory 

S. Severin Sorensen. . . . 

Herreshoff roasting 

Furnaces, electric, possible application to Western metal- 
lurgy Dorsey A. Lyon, Robert M. Keeney. . . . 

For smelting copper ores Editorial.... 

In zinc smelting, Belgian George C. Stone.... 

Oil-burning In Herbert Lang.... 

Rotary roasting 

Fuse, electric time E. Le Roy.... 

Injury 

Preparation of primers 

Fushun coal mines Editorial.... 

Fyro, J-M, fire-extinguisher 



906 
945 
1027 
919 

59 
920 

947 
870 

696 
195 
701 
34 
68 
393 
509 
536 
15 
951 
443 
793 
379 
588 

984 

935 
935 
904 
877 
708 
347 
536 

1040 
426 

1040 
408 
2 

354 
38 
40 
118 
488 
830 
838 
381 
865 
622 
■ 382 
104 
243 
175 
26 
445 
334 

929 
919 
38 
466 
482 
193 

827 
819 



107 
876 
330 
940 
223 
991 
743 
154 
781 

176 
870 
700 
869 
703 
876 
42 
638 
835 
539 
539 
329 
150 



575 
683 



517 
931 
64 
697 
972 

1021 
975 
841 

1040 



324 
34 5 
239 
218 
735 
105 
110 



In 1912 

Gamba, F. p Emerald fields of Colombia..!! 

Gambrinus mine, California 

Ga V!! son ' F ' Lynwood Agricola: an appreciation!!!! 

r. . .?' '.V W.: Geological survey of China 

Gartrell. H. W. Workmen's compensation problems 

Garvey, A. E Winter work In Alaska 

faas engine. Crossley suction, at Central Red White 

& Blue mine, Bendigo iq-m 

Low " jg ft 

Natural, consumed in Pennsylvania ...'!!!!."" 720 

Natural, price of 534 

Natural, production In Oklahoma !!!!.'!!.'!!' 851 

Natural, production In United States 707 94° 

New York production in 1912 ' 733 

Trouble. Holbrook shaft. Copper Queen !!!! 160 

Gasoline motors in coal mines, use of.. A. F. King.. 463 

Gatun lake. Canal Zone 978 

Gaumus company, dredging in Philippines !!!!!' 1033 

Geduld Proprietary Mines, Far East Rand 314 

Geevor tin mine, discussion by Horace G. Nichols, In- 

stitution of Mining and Metallurgy. London 979 

Gems, mined in United States 94 

General Chemical Co., Herreshoff roasting furnaces 684 

General Development Co. and Hollinger Reserve 696 

General Petroleum Co. reorganization „ 905 

Under control of British syndicate. .. .Editorial. .. . 878 

Generator, Commonwealth v. Cambridge 626 

446 
518 



Genesis of Butte ores Editorial. 

Of Coeur d'Alene ore deposits Editorial... 

Geologic formation names 819 



Notes underground. Anaconda Copper Mining Co. . . . 940 

Work on the Mother Lode 890 

Geological Congress at Sudbury Editorial 215 

At Toronto. International Editorial.... 830 

Geological Society of America, Princeton, New Jersey 

meeting Editorial 842 

Geological survey of China Henry Brellch.... 976 

Ditto F. Lynwood Garrison.... 735 

Geological Survey, United States, production statistics: 

Antimony ' 250 

Arizona metal production 78 

Arsenic 260 

Asbestos in United States 669 

Barytes in 1912 36 

Bismuth 250 



Borax In 1912 



324 



California geology 544 



California minerals 
Cement In United States in 1912.. 
Central States, metal output .... 
Chromic iron ore in United States 

Coal In Colorado 

Coal in Montana 

Coal in Now Mexico 

Coal In Oklahoma 

Coal mining in Pennsylvania 404 

Coke In 1912, manufacture of 480 

Diamonds in Arkansas 

Gems in United States in 1912 

Gypsum 250, 

Idaho, metals In 

Iron In 1912 

Mineral paint 399 

Mineral products of United States In 1912 914, 954 

Montana metals 



516 
167 
78 
334 
28 
28 
74 
340 



79 
94 

533 
208 
58 



208 



Nevada metals 313 

New Mexico mines 65 

North Carolina mineral production 404 

Oregon metal production 480 

Oil in 1912 652 

Potterv Imports. United States in 1912 619 

Pyrlte In United States in 1912 149 

Quicksilver In 1912 167 

Salt and bromine In United States 444 

Sand and gravel In United States 444 

Selenium 259 

South Dakota metal 404 

Sulphur In United States In 1912 126 

Talc and soapstone 250 

Wyoming, metal production 404 

Geological Survey, United States: 

General geology still work of Editorial.... 481 

Glaciers In Alaska 361 

Public lands reopened for entry 208 

Recovery of quicksilver from ores 348 

Work of 939 

Geologists and engineers again Editorial.... 921 

And mining engineers in the field, means of loco- 
motion 902 

State, geological correlation discussed. .Editorial. .. . 637 

Geologv of Alleghany district. California 22 

Of Kalgoorlle Editorial 43 

Of Kalgoorlle Goldfleld— I. II. III. IV. V 

Malcolm Maclaren and J. Allan Thomson.... 

45, 95. 187. 228, 374 

Georgetown district. Colorado, ore value in early days. . 200 

Mining district, Montana 546 

Georgia, mineral production 167 

German mine, Gilpin county. Colorado 155 

German worklngmen's insurance 774 

Germany, coal mine fatality rate 876 

Copper in 386 

Divining rod Editorial 842 

Imports 1037 

Iron production 103 

Mineral production In 1912 1035 

Pig Iron production 217 

Potash field 210 

Gerry, C. N. Metal output of Idaho 208 

Giant Mines of Rhodesia, Ltd 209. 659 

Company report 706 

Gllmore district. Idaho 907 

Gllmore mine, Idaho 870 

Glroux Consolidated Copper Co 285. 358 

And Butte & Ely 506 

Glacier trail to Shushana 966 

Glaciers. Alaska 361 

Gladstone tinfield. Tasmania 61 C 

Glass, grinding, and furnace sand production 480 

Glenn Consolidated Mining Co., California 906 

Globe Consolidated Mining Co 869 

Globe & Phoenix. Rhodesia 79. 209, 381, 390, 1027 

Gnamma holes and soaks. Western Australia 515 



Vol. 107 



MINING AND SCIENTIFIC PRESS 



I'll K i* 

Qovpnt-r- Wltt*r patent Editorial. . . . 4o7 

Qo«ra group. Rand 314 

Qoatbala, CoL Uourgo W Editorial.... £13 

Qogo Julc* In panning gold-b»arln« sand, Philippines.. 3M 

Oold accretion lus 

Alaaka ar,6 

Alluvial 46 

And copper field. Cobar, New South Wales 300 

And silver bullion. Salvador. Central America 680 

And fcllver export*. New Zeuland 1022 

And ellver In aqueous cyanide solutions, retardutlun 

phenomena In the solution of 889 

And silver In 1»12. production 818 

And silver, Japan f,12 

And sliver mines listed In United Statea 838 

And silver. Plxley and Abell report 166 

And silver production, Auckland province. New Zea- 
land 494 

And silver production. Charters Towors, Queensland. 854 

And silver production of United Statea 477 

And silver transactions 398 

Anneallns of 720 

Bank of Englund 704 

Burs, sales from New York Assay Office 276 

Black 571 

Discovery, Isaac's Harbour, Nova Scotia 982 

Dredge recovery 940 

Dredges, Alaska 876 

Dredging, South Island. New Zealand 1023 

Fineness at Fairbanks. Alaska 347 

From cyanide solutions, precipitation on sine wafers. 557 

Hoarding In East Editorial.... 560 

Hydraullcklng In New Zealand 772 

In n specimen stone, estimating 708. 750 

In Honduras 49 

In orebodles. precipitation of 309 

In Surinam 1020 

In world's banks 183 

Industry in 1912. Wltwatersrand. .W. L. Honnold..!. 182 

Milling In China 227 

Mining In Hungary lO^l 

Mining, largo scale Editorial 879 

Mining regulation. Russia Editorial 673 

Movements. Great Britain 951 

Oil. and coal production of Dutch East Indies 310 

Ontario 459 

Ore treatment, simplification of A. W. Allen.!" 254 

Ditto John B. Stewart.... 466 

Ores, cyanldatlon 757 

Placer district. Alaska, new 627 

Placer production, Alaska 835 

Placers, Alaska 876 

Precipitation by manganous salts.. A. D. Brokaw 149 

Production J. R. Finlav 536 

Production and industrial conditions .. Editorial 174 

Production In Arizona 78 

Production. Bondigo, Australia 296 

Production, British Guiana 581 

Ditto Editorial 518 

Production, Cripple Creek, Colorado 72 

Production, Kotar, India 584, 694 

Production, Nevada 313 

Production, New South Wales 581 

Production. New Zealand 581 

Production, Ontario 825, 982 

Production, Queensland 58l| 774 

Production. Rand 982 

Production, Rhodesia 209, 390, 581 

Production, Taiwan 898 

Production. Transvaal 581 

Production. Utah In 1912 665 

Production, Victoria 581 

Production "West African mines 17, 270, 581 

Production Western Australia, 48, 125, 235, 581. 594, 

618, 835, 951 

Reserves. India 1037 

Returns. Kalgoorlfe. Western Australia 433 

Stealing, Rand 126 

Supply, quest of Editorial 754 

"Value in decimals Editorial.... 842 

Yield of West African mines 892 

Gold Bullion mine, Alaska 336 

Gold Dollar mine. Cripple Creek, Colorado 299 

Gold Hunter Mining & Smelting Co. property valuation. 241 

Gold Ore mine, Arizona 906 

Gold Reed Mining Co.. Arizona 984 

Gold Road mine, Arizona 116, 356 

Golden Butterfly. Western Australia 594 

946 
907 



Golden Cycle Mining Co.. Colorado, accidents 907, 

Dividend 241. 509, 743, 

Mine, Colorado 

Mill, cyanldatlon 

v. Charles Butters suit Editorial. . . . 

Golden Eagle Mining Co.. Washington, cyanldatlon 

Golden Gate mine. California 

Golden Horse-Shoe Estates. Ltd., Western Australia, 235, 
321, 433. 468, 594, 626, 655, 835, 

Condition 943 

Dividend 943 

v. London & Hamburg Gold Recovery Co., Ltd 

Editorial 407 

Golden Reward mill, Black Hills, South Dakota 1031 

Mine 158, 826 

Golden Ridge, Western Astralia 235, 433, 594, 835, 951 

Golden Springs mines. New South Wales 1024 

Goldfleld district, Nevada 59 

Cloudburst Editorial 445 

Geology of Kalgoorlie I. IT, III. IV, V Malcolm 

Maclaren and J. Allan Thomson 45, 95, 187, 228, 

•Relation of faulting and mineralization in 

Corrin Barnes and E. A. Byler..., 
Goldfleld Consolidated Milling & Transportation Co. v. 

Sandstorm Annex Gold Mining Co 701, 

Goldfleld Consolidated Mines Co., 59, 118, 242, 590, 701, 

787, 

Buckhorn mine 436, 

Company report 37, 206, 363, 552, 744, 

Cyanidation 757 

Dividend 398 

Goldfields, Kalgoorlie Editorial.... 43 

Goldflelds Rhodesian Development Co 762 

Goldstream, No. 17, Alaska 627 

Good fireplace J. D. Hubbard. . . . 426 

Goodale, C. W., Horace Winchell, M. L. Requa. .Revision 

of United States mining laws • 571 

Gould Consolidated, Canada 7S*? 

Seneca Superior vein 903 



760 
877 
909 
983 

951 



374 

59 

870 

947 
452 
90S 



I'aun, 

Government, business of Editorial.... 87S 

Control of strikes Editorial.... 600 

Prospecting M 1 1 1 1 . 1 1 1 Hon.) J.K2 

Albort Burch .. 1 ■ 

Ditto Editorial 331 

Ditto K. p. MaoLaughlln . . . . 466 

Ditto O. U Sheldon 820 

Grunt. v Consolidated Mining, Smelting A Power Co., 
Ltd., Phoenix and Hidden Creek. Ifrltlsh Columbia 

115. 103, 243. 276. 437, 624, 635, 733. 783. 791. 9!*l 

Anynx, employees cottages 67 



Anyox, analyses of orebodles 

Company report 630 

, Dividend 368, 871. UIO 

Hidden Creek mines 691, 

Midas mine 663, 

Phoenix mines 

Smelter. Grand Forks, British Columbia, 206. 321, 

630, 708, 871, 

Snowshoe Gold & Copper Mines. Ltd.. properties 

Grand Junction. Now Zealand 494 

Cyanldatlon 759) 

Grand Prize placer mine. Oregon 788 

Graphite brushes for dynamos 918 

Use In steam boilers 38 

Graphitic schists, Kalgoorlie 616 



OS 



10:16 
828 
708 

987 

lOLMt 



Gravel plant In Nevada 

Prospecting for dredging operations 

Great Boulder Proprietary Gold Mines, Ltd.. Kalgoor- 
lie, Western Australia 236, 655, 835, 951, 



68 
902 



1024 



Alnska option 626 

Company report 40 1 

Mine 433, 469, 516, 594 

Operation of 373 

Great Boulder Perseverance Gold Mining Co., Com- 
pany report 442 

Great Britain, coal mine fatality rate 876 

Gold movements 951 

Great Cobar Copper Co., New South Wales.... 78, 262, 729 

Great Falls plant, experiments on basic lining 61 

Great Flngall Consolidated, Ltd., Western Australia.. 

235, 433, 468, 694, 655, 835, 951 

Company report 670 

Costs at mine 732 

Cyanldatlon 758 

Great FItzroy Mines, Ltd., Queensland, Australia. .729, 977 

Great Lakes, storm, life and property loss 870 

Great Victoria mine. Western Australia 942 

Great Western Copper Co 116 

Old Mammoth mine 27 

Great Zeehan Dundas Silver Lead Mining Co., N. L., 

Tasmania 314 

Green Mountain Mining Co., Idaho, organized 986 

Greene Cananea Copper Co., Mexico 196, 315, Ml 

Dividend 1033 

Grinder, Lovett 372 

Grinding pan practice John Randall. . . .233, 737 

Ditto * M. G. F. Sohnlein 900 

Ditto M. W. von Bernewitz 234, 737, 901 

Grondal-Kjellin Co. of London, tin reduction experi- 
ments in Cornwall 818 

Guamos Placer Co., Philippine Islands 120 

Guanajuato Consolidated, cyanidation 759 

Guayaquil, Ecuador, sanitation loan Editorial .... 841 

Guggenheim Exploration dividend 914 

Gulick, Hervey. . .Stirling v. Babcock & Wilcox hollers. 861 

Gwalia Consolidated mine. Western Australia 249 

Howe volatilization process 535 

Ditto Editorial 51S 

Gwalia Consols mine, Western Australia, abandon- 
ment 942 

Volatilization of gold "SI 

Gypsum 210 

In Virginia 1» 

Production in United States 250 

Production in 1912 250, 533 

H 

Haas. Herbert. . .Development of converter practice.... 653 > 
Hague, William and Robert H. Bedford Rock-drill 

testing at tbe North Star 

Haldane flame-test apparatus 

Hale, E. W Copper matte and base bullion from an 

electric spelter furnace 

Hale & Norcross lessees 

Haley, C. S Successful salting of alluvials. . . . 

Haley, Charles S. and C. A. Rodegerdts. . . .Prospecting 

conditions in Peru, I, II 922, 

Hall, Albert E...Stoping drills at Sudbury. Ontaria 

Hall, R. G Psychology of zinc... 

Hall desulphurizing process 161. 408. 435. 

Ditto Editorial. .. .2, 

Process and Balaklala Copper Co 

Hamilton Power & Mining Co., Nevada 

Hammer drills 

Drills in Witwatersrand 

Hampden Cloncurry Copper Mines, Ltd., Queensland. 

Australia 

Company report lil.v 

Hand-drilling contests Editorial.... 

Handling flue-dust at the Copper Queen smelter 

James Douglas 

Ore from stock pile at Miami 

Hannan's Star mine, Kalgoorlie 

Hansen. C. M Drilling in mid-air.... 

Harbors in British Columbia, cost of removing silt 

from • • ■ • " "I • • ■ ■ ■ 

Hardinge mills v. Chilean mills Robert Franke 

Hardsocg Wonder Drill Co., a new drill 

Harron, John O., death of .................... 

Hartley & Riley Beach Dredging Co.. New Zealand... 

Hatch. F. H Rand banket.... 

Hauck portable fuel burner • • ■ . . •.• ■ 

Hazel Gold Mining Co., Shasta county. California. 

dividend A ' 

Headlight Co. v. Federal Mining & Smelting Co. ...... 

Heberlein. Ferdinand. .An excursion to North American 

smelting works 

Hecla Mining Co., Idaho ■ • • • 

Hedley Gold Mining ' Co..' British' Columbia... .159. 630, 
Dividend ....358. 475 910 980. 

Heidelberg group. South Dakota, development by Dead- 
wood Business Club 

Heikes V C Metal production of Arizona.... 

Ditto Metal production of Montana.... 

Ditto Metal output of Nevada.... 



179 
40 

974 
357 
1000 

967 
310 
273 
541 
481 
628 
745 
4 64 
619 

729 
1037 
3 



249 
212 

443 
223 
918 
1033 
l 001 

IU19 

952 

946 
393 

713 
211 
870 
788 
9S7 

353 
78 
208 
313 



10 



MINING AND SCIENTIFIC PRESS 



Vol. 107 



Page. 

Helena. Montana. United States Assay Office 659 

Helium, geologists' time recorders 939 

Henderson. Charles \V Mine production of Colorado 

In 1912. by counties 554 

Hercules Mining Co.. Shoshone county. Idaho 241, 509 

Dividend 358 

II. -i i fshi.fr roasting furnace »:S3 

ilershey. Oscar H Origin "f lead. zinc, and silver In 

the Coeur d'Alene — I, II 489. 529 

Herzlg. Charles S. Ore.... 427. 537 

Hess, Frank L*. .... White arsenic In United States in 

1912 ft. 622 

Hidden Creek copper mines, progress at 691 

High Grade district. California 661 

High voltage direct-current locomotives 83 

Hlllahee mine. Alabama, reopening 107 

Hill City M. & D. Co 

Hills. Victor G. Professional ethics. 



660 

976 

Hog Mountain Gold Mining Co., Alabama 107 



Hoist, automobile 

Leadvllle drill column 



150 

328 



Hoisting at a Chinese mine 137 



Ditto M. w. von Bernewltz. 

At North Butte mine, Montana 



795 
982 



193 
975 

Cage, new : 172 

In balance Editorial.... 920 

Men In mines 978 

Hoists, counterbalancing 936 

Holde's method 170 

Holdings of the Holllnger Reserve Mining Co.. Ltd 732 

Holdsworth, Fred D Sullivan angle-compound air- 
compressors 

Holllnger Gold Mines, Ltd.. Porcupine. Ontario. 197, 

321, 542, 780, 948, 

Costs at 554 

Dividend 475. 1032 

Holllnger Reserve Mining Co.. Ltd., Porcupine, Ontario, 

642, 630, 780 

And General Development Co 69.6 

Holdings of 732 

Holmes, J. A. ... .Lessons of the year In our mining 

Industry 680 

Home made self-loading and dumping water skip 

H. E. Wharton 461 

Rule In Alaska Editorial 41 

Homestake mine. California : 589 

Homestake Mines Finance Co 741 

Homestake Mining Co., Lead City, South Dakota, 

Christmas present 909 

Cyanldatlon at 757 

Dividend 167, 158. 354. 913, 1031 

Dividend rate 1025 

Improvements ■. 826 

New hoisting equipment 1031 

Production 826 

Property valuation 475 

Slime plant, pulp transportation 515 

Sunday rest 506 

Honduras, minerals In 50 

Olancho county A. D. Akin.... 49 

Honnold. W. L. . . . . Wltwatersrand gold Industry In 

1912 

Hooper. Speak & Co.. mining on the Suan concession. . . . 
Hoover. H. C. and Lou C. gold medal of Mining and 
Metallurgical Society of America. . . .Editorial. . . . 

Horn Silver Mining Co., Frisco. Utah 119 

Company report 40" 

Hornsllver Mining Co.. Nevada 

Horse Mountain Mining Co.. Colorado. Incorporated... 
Horwood. C. Baring. ... Irldosmine from New Randfon 

teln mine. South Africa 494 

Ditto Rand banket I. II. III. Ill cont. IV. V. VI. 

VI cont. VII 563. 604. 647. 676. 721. 

763. 779, 806. 956. 1003 

Horwood's proces In flotation 334 

Hot Springs district, Alaska, output In 1913 906 

Hough. Ulysses B Coeur d'Alene mine-car.... 

Houghton Copper Co.. Company report 

Howe process, volatilization at Gwalla Consolidated 

Mine. Western Australia 235, 

Ditto Editorial 

Volatilization process, collapse of 942 

Huanuco goldfleld, Peru 611 

Hubbard. J. D A good fireplace.... 

Hudson Bay, Cobalt. Ontario 746, 

Huerta's message. President Editorial.... 

Huff electrostatic plant. United States Smelting, Refin- 
ing & Mining Co 

Method of electrostatic separation or ores 664 

Human side of milling Gelaslo Caetanl.... 

Ditto Editorial 

Hungary, gold mining In 1021 

Huntoon. Archie Mining law and the pros- 
pector 694 

Hurst. G. L.. . . .Resolllng after dredging In Callfor-.... 

nla 719 

Hurter. Charles S Electric blasting.... 734 

Hutchlns. John Power. .Dredging by hand In Siberia. . . . 813 

Hutchinson. Charles T Underestimating the cost of 

milling plants 349 

Hutti (Nizam's) Gold Mines. Ltd., Kolar. India 694 

Company report 442 

Hyde. James M.. v. Minerals Separation. Ltd 270, 903 

Hyde process at Butte & Superior, and Minerals Sepa- 
ration, Ltd., suit 237 

Process of mineral flotation at Butte & Superior 

Court's decision ~. Editorial.... 173 

Hydro-electric power, Japan 403 

Hynes. D. P. Microscope In mining.... 110 



182 
256 



841 



787 
869 



805 



35 
518 



426 
910 

520 

666 
708 
800 
798 



Iceland, water-power In 361 

Ida H.. Western Australia 235. 433. 594, 655, 835. 951 

Idaho, Blaln county geology 629 

Coal and lignite deposits 590 

Coeur d'Alene district 241, 907 

Gllmore district 907 

Lead In 1030 

Metal output 208 

Mineral production In 1912 1030 

Origin of lead. zinc, and sliver In the Coeur d'Alene 

F II Oscar H. Hershey 489. 528 

Idaho-Bride M. & M. Co.. Colorado 743 

Idltarod-Innoko placers, Alaska 819 

Idora Hill Mining Co and Tuscumbla Mining Co 785 

Illinois, coke In 379 

Mineral production In 1912 733 



r.ige. 

Immigrants and mines Editorial.... 710 

Imperial mine, Oregon 987 

Imperial Reduction Co 868 

Import statistics. United States Geological Survey. 

potash salts 12 

Improved automatic water gauge 290 

Improvement of miners* surroundings 106 

Inclined lines .* L. B. Karnes.... 503 

Ditto • H. G. Nichols 823 

Ditto A John E. Rothwell 194 

Increasing the capacity of slime thickeners 554 

Inde Mining Co.. Mexico 988 

Index numbers 793 

India and China, currency problems in the Orient 

Editorial 764 

Coal mine fatality rate 876 

Coal production 876 

Gold reserves 1037 

Kolar goldfleld 38, 584, 694 

Kolar goldflelds power transmission 327 

Standardization of weights and measures 972 

Tungsten and tin 691 

Indiana, mineral production 935 

Industrial materials of California 207 

Prosperity, big business and....C. R. Van Hlse.... 730 

Infusorial or diatomaceous earth 250 

Ingliston Consols. Western Australia 235, 594. 655. 951 

Innolro-Idltarod placers. Alaska 819 

Inspection In mines Editorial.... 86 

Inspiration and Mines Company of America 904 

Inspiration Consolidated Copper Co.. Miami. Arizona. 

160, 279. 506, 58S. 984 

Mine 522. 903 

New test-mill 866 

v. New Keystone 391 

Institute and the Society Editorial 366 

Ditto A member of both.... 538 

Institution of Mining and Metallurgy of London 113 

Ditto Editorial 129 

Geevor tin mine discussion 979 

Insurance companies, mutual among coal operators... 

Editorial 86 

German worklngmen's 774 

International Coal & Coke Co. dividends 358 

International Engineering Congress Editorial 213 

International Exposition of Safety and Sanitation 

Editorial 214 

International Geological Congress at Toronto, persist- 
ence of ore deposits In depth Editorial 330 

International Safety and Sanitation Congress 

Editorial 955 

International Smelting & Refining Co 111. 119. 275 

New copper smelter 361 

Iowa, mineral production 930 

Ipoh Tin Dredging Co.. Federated Malay States 623 

Iridium steel, analysis 940 

Irldosmine from New Randfonteln mine. South Africa. 

C. Baring Horwood.... 494 

Iron and steel Industry of Canada Editorial 174 

And steel output of Italy 528 

And steel production statistics 707 

And steel, use of copper to Improve qualify.... 

Editorial. .. . 709 

Canada as a producer Editorial.... 406 

In Norwav and Sweden 35 

In oxidizing ■ 288 

Mine. Loussavaara-Klrunavaara, Klruna, Lap- 
land "2 

Nail method of assaying 1'0 

Ore. chrome. In United States 334 

Ore deposits of Chile Carlos Vattier 893 

Ore, Lake Superior region 270 

Ore, mining in Cuba 534 

Ore traffic 750 

Ores, Brazilian 

Ores, brown, in Texas _« 

Ores of the United States, tltanlferous 670 

Pig. production In United States 210. 616 

Pig production of Germany 217 

Production In Germany 103 

Production of United States In 1912 JM 

Ralls In ore-bins 8'R 

Ranges of Minnesota JjSjJ 

Wrought, and soft steel • • • ■ 7J3 

Iron Blossom, Utah • :...119. 

Dividend 7 "*6 

Iron Cap claims. Chewelah district. Washington ...... 832 

Iron Cap Copper Co.. Arizona 275, 828. sbk 

Iron Mountain Tunnel Co., Company report 443 

Mine "I"** 

Ironfield. An-Chi . . .C. T Wang. ... 311 

Irvln. Donald F Trent agitators 821 

Irvinebank Mining Co.. Ltd.. North Queensland 382 

Aerial tramway 382 

Isaac's Harbour. Nova Scotia, gold discovery 9»2 

Isabella mine. Cripple Creek. Colorado 280 

Isle Royale Copper Co.. Houghton. Michigan. 590. 636. ^ 

Company report 826 

Italy, electric traction |}J 

Iron and steel output :;;' , ,v.' , ;;; ,, .V.' 

Ivanhoe. Western Australia. 235. 433. 468. 594. 655. 781. 

5i)3, .Ml. ' 1 ' - ' 

Ivanhoe Junction 4e 8 



.I-M Fyro fire extinguisher J2J? 

.Tack-augur drill. Mesaba Range. Minnesota 1024 

Jamestown Consolidated Mines Co., Chllano mine 318 

Japan and China, coal mining In 35 

Coal mine fatality rate 876 

Gold and sliver Jjj 

Hydro-electric power 403 

Picking belts. Mitsui Co 750 

Japanese coal situation 31 

Contemporary 'Miners' Friend' 601 

Oil production ■ ■• 186 

Jarvis. Royal P... Revision of United States mining 

laws 862 

Jerry Johnson Gold Mining Co.. Cripple Creek. Colo- 

rado 509 

Jim Butler mine, Tonopah, Nevada 665. 871. 1030 

Jim Butler Tonopah Mining Co.. report 909 

Jo Dandy mill. Raven Hill. Cripple Creek, Colorado 2J9 

Jobs, are there enough to go around? 

F. Sommer Schmidt 900 



V..1. 1»7 



MINING AND SCIENTIFIC PRESS 



11 



Johnston. John 



Jok 

Jon 



■ Role of proaaure In chemical 



P*»t''. 



> * » •••» "III. > ••:»..»» In Alaska 

Editorial. . 

Jone*. DwlKht A 8t. Joseph l^uil Co... 

Joplin district. MUaourl. delinquent taxes 

Minerals 



( at 



.35. J87, 



(01 
85! 

8« 

l< 

»to 

1011 
126 

738 
940 
102< 



314 

166 

79 



Josephine mine, California 300 

Journalism, yellow Editorial. 

July copper production 246, 

June copper production , 77, 

Juneau, large ac 
Junta Consolidated Gold 
Jupiter and Pearl Lake 

Bond Issue 

Jupiter company. Porcupine 169. 

Jupiter (told Mining: Co.. Ltd.. company report 125 

Jupiter mine. Rand, closed 905 

Jupiter Mining* Co., bonds to raise Indebtedness. 



Btlon 

Bold mining Editorial. 

" Mining Co 118 

112 
903 

780 



, 1V _. 



Kaedlng. Henry Barrlohlet. death of 438 

Ktilxoorlle. first-aid 327 

Geology of Editorial 43 

Gold production .* 48 

Gold returns 433 

Goldfleld. geology of— I. II. III. IV. V Malcolm 

Maclaren and J. Allan Thomson. .. .45, 95, 187. 228, 374 

Graphite schists 616 

Orlnding-pan practice John Randall 233. 737 

Ditto M. W. von Bernewltz 231. 737 

Mines, various 70 

Ore formation and country rock 733 

Ores, cyanldatlon 759 

Power cost 236 

Residue disposal 902 

Tellurlde8 375 

Kalgurli Gold Mines. Ltd.. Western Australia 

236, 433, 594, 626. 655. 835, 943 

Company report 836 

Mill, cyanldatlon 759 

Ore formation and country rock 733 

Kampnne Kamunting Tin Dredging Co.. Federated 

Malay States 623 

Kanda. Reijl Bujun coal mine in Manchuria.... 856 

Kansas-Missouri-Oklahoma zinc-lead ore prices 1026 

Ore production 543. 866, 889 

Kauri gum, Auckland province. New Zealand 1023 

Keane wfonder property, California 783 

Keeney, Robert M. and Dorsey A. Lyon Electric 

smelting of copper ores 976 

Ditto. .. .Possible applications of electric furnaces 

to Western metallurgy 686 

Kelvin-Sultana 904 

Kemp. J. F. Water In veins 938 

Kennedy Extension Mining Co. v. Argonaut Mining 

Co 472 

Kennedy mining district, Nevada 242 

Kentucky, coal In 939 

Kentucky Lead & Zinc Co., incorporated 786 

Kern. Edward F.. .Electrolysis of cyanide solutions.... 577 

Kerr lake, draining 317, 746 

Kerr Lake Mining Co., Company report 478 

Ketahoen mine. Sumatra island, Dutch East Indies, 

wages paid 940 

Keystone Mines Co.. Amador City, California, report.... 1028 

Kieselguhr, fuller's earth 793 

Kimball. J. P.. death of 703 

Kimberley Reed. Rhodesia 761 

Kimberly Consolidated Mines Co. and Philadelphia 

Western Mining Co 510 

King. A. F....Use of gasoline motors in coal mines.... 4R3 

King's Quicksilver Mining Co.. Canada, in California... 906 

KIrkland Lake 159 

District 317 

District discoveries 197 

Kirkland Lake Proprietary Ltd.. organized 1032 

Klelnfonteln and tube-mills 55 

Knob Hill, dividends 278, 358 

Knox. Henrv H Rand banket.... 899 

Knoxville. Tennessee. National Conservation Exposi- 
tion Editorial 365 

Knv-Sheerer Co.. new stretcher 795 

Koiar goldfleld. India 38. 584. 694 

Power transmission •■• 327 

Komata Reefs. New Zealand 682. 1023 

Kootenai district. British Columbia, production of 

mines "Jno 

Korea, mining concessions 4-3 

Mining on the Suan concession 256 

Oriental Consolidated Mining Co., 164. 321, 511, 630. 

871. 988, 1033 

Oriental Consolidated Mining Co., work of 

Alf Welhaven 

Seoul Mining Co 

Transportation in 

Koyukuk-Chandalar region. Alaska 

Kreuger & Co., Rudolf Wolff spelter report 

Krusch. P Primarv and secondary ores considered 

with especial reference to gel and rich heavy 

metal ores • • • • • • • • 

Kyara, Western Australia .....594. 835. 

Kyshtlm Corporation. Ltd.. company report 



857 
552 
269 
160 
834 



418 
951 
247 



Labor, doubtful leadership of Editorial 

Lackawanna Belle Gold Mining Co., Colorado 

Lackawanna railroad. Supreme Court decision 

Editorial .... 

La Dura mine. Mines Company of America 

Mine closed 

Lady Belle mine. Colorado 117, 156.. 280. 

Lady Miller. Western Australia 433, 

La Grange Mining Co 

Lahat Mines. Ltd.. Company report 

Laist copper precipitating method at Anaconda . .... 

Lake Copper Co • » 9 - •>»». 

Lake Superior district copper companies . .......... 

District strike 162. 241. 275, 319. 352. 393. 436. 473. 

U,s 505; 509, 546. 586, 590. 664. 785. 870. 986. 

District, copper mines map 



798 
946 

920 
741 
833 
743 
594 
829 
80 
830 
471 
285 

1026 
275 



District, Iron ore ■hlpmonta fjo 

District mine rescue and safety organisations 1026 

District, underground limbering rules 901 

i! r !S* ••V« Editorial .... 174, «74 

Strike and Ifutte miners union S8B 

Strike and Cltlxon's Alliance S98 

Dill" Editorial 878 

Strike and dividend curtailments 642 

Strike and New York copper 195 246 

Strike nnd fclinrcholdcrs loss In dividends 

Editorial 954 

Strike and women Editorial.... 446 

Strike, oni'-mnn drill 692 

Strike, picketing Editorial 518, 599 

Lake View & Stur, Ltd.. Western Australia 

106, 235. 249. 433. 694. 626, 655. 835. 911 

Company report 168 

Costs at 181 

Lake View Consols. Western Australia 835. 943. 951 

Mill, cyanldatlon 760 

La Lucotte. passing of Editorial 330 

Lampazos mine. Mexico 948 

Lamps, portable electric mlno....H. H. Clark.... 62, 328. 934 

Lancefleld mine, abandonment 942 

Closing 634 

Land law rovlsion, plain talk on. .George Otis Smith. . . . 640 

Lands reopened for entry, public 208 

Lnndslldes, causes 597 

Lano slow-speed Chilean mill data 136 

Lang, Herbert Building a reduction plnnt 4 

Ditto. . . .Common sense of the fume question. . . .341, 540 

Ditto Oil burning In furnaces.... 64 

Lapland. Loussavaara-Klrunavaara Iron mine 720 

La Plata mountains. Colorado. . . .Rensselaer H. Toll. . . . 849 
La Rose Consolidated Mines Co., Cobalt, Ontarla. 195, 

354, 739 



903 

Dividend 548 

982 
879 
996 
519 



252 
43 
694 
826 
920 



778 
862 
523 
294 
903 
252 



Mine 

Large scale gold mining Editorial 

largest mine locomotive 

Launching a republic Editorial 

Law — sec mining revision 

Law. Alaska mining Editorial 

And mining in West Virginia Editorial 

And the prospector, mining. .. .Archie Huntoon 

Blue sky. South Dakota 

Federal workmen's compensation Editorial 

Mining, Victoria. Australia 1024 

Revision of mining Editorial 998 

Revision of mining, a protest 601 

Revision of mining, a critique. -Robert M. Searls.... 1014 

Laws, revision of the United States mining 

Courtenay Dp Kalb. . . 

Ditto Royal P. Jarvls... 

Leaching copper ore, oxidized w.ith sulphuric acid... 

Copper ores John Rooke-Cowell . . . 

New plants 

Sulphuric acid Editorial... 

Trouble 16 

Lead 912 

And zinc district. Missouri-Kansas-Oklahoma 1026 

and zinc production. Missouri 814 

Concentrator. Zinc Corporation. Ltd 105 

In Idaho 1030 

Ore production in 1912 595 

Production of Arizona 78 

Production of Nevada 313 

Production of Utah in 1912 665 

Salts in cvanidation Vyvyan C. Bennett.... 154 

Ditto M. W. von Bernewitz 757 

Silver mine. Magnet. Tasmania P. G. Tait 102 

World production in 1911 and 1912 915 

Zinc, and silver in the Coeur d'Alene. origin of— I, 

II Oscar H. Hershey 489, 529 

Zinc district, Missouri-Kansas-Oklahoma 866 

Zinc district. Wisconsin 981 

Zinc field. Wisconsin v;""' 

Leadville. Colorado, unwatering workings of Fryer 

hill 985 

Drill column hoist 328 

Leasing and low-grade milling at Cripple Creek. .. 

Stephen L. Goodale 297 

Leeson, C. G Camanche dredge, California 933 

Lemhi county. Idaho .'.Vtii'VoV SnS 

Lena Goldfields. Ltd.. Siherfa 425. 527, 684, 892 

Lennan Mining Co., T. F.. Oklahoma 866 

Le Rov No. 2, Ltd.. British Columbia 702 

Dividend .358, 91" 



972 
537 



680 
761 
899 



Le Roy, E Electric time fuse 

Ditto . '. Miners v. technical men 

Lessons of the year in our mining industry.... 

J. A. Holmes 

Letcher, Owen... New treatment plants in Rhodesia 

Lett, Stephen J Rand banket 

Levant Company, Cornwall. England ■ ■ • • 352 

Lewis & Sons, James, copper report 169. 

Ditto Copper situation in Europe.... 51 .i 

Liberty Bell mine. Colorado, cyanidation 759 

Lignite and coal deposits. Idaho ■>»« 

Lilligren, J. M. Professional ethics 821 

Lillooet district. British Columbia g'' 

Lime, action on colloidal matter in ores »'» 

Production in United States j"' 

Lindley's definition of mineral land ...... ... -• »»' 

Linings, steel sluiceway W. W. Edwards.... 85„ 

Littie Bob Mining Co.. Missouri 'J! 

Little Mattie mine. Colorado 

Localizing coal-dust explosions . . lyiUlll 

Locke, Ernest G Re-awakening of an old placer 

camp '* 

Locomotives, high-voltage direct-current 

In Alaska, pioneer electric = '° 

Largest mine :•;:",' ^it'nVloi 

Lode mining in interior of Alaska ... ...Editorial ... . 

Mining in Willow Creek district. Alaska....... 

Sumner S. Smith .... 
London & Hamburg Gold Recovery Co.. Ltd.. V Golden 

Horse-Shoe Estates Co.. Ltd Editorial 401 

London-Arizona Consolidated Copper Co «<- 

London Salisbury House 

Lonely Reef Gold Mining Co., Ltd., company report.... 

Mine ' 

Lo S M An e geles a Chamber 'of Mine's and'oii,' Blsbe'e 'copper 

ores - - 

Lost Packer Mining Co 630 

Dividend • 375 

Louisiana, rock salt 



618 



373 
83 



330 
335 



80 
209 
82 

946 
473 



12 



MINING AND SCIENTIFIC PRESS 



Vol. 107 



Page. 

Sulphur In 859 

Loussavaara-Kirunavaara Iron mine, Lapland 720 

Lovett grinder 372 

Lucas property, Colorado 869 

Lucky Tiger-Combination Gold Mining Co., Mexico, 631, 

783, 911 

Lundberg. Dorr & Wilson. South Dakota 315 

Mill, closing Editorial 291 

Lunt, H. F. and H. W. Fox Hlllabee gold mine. 

Alabama » 107 

Lyon, Dorsey A. and Robert M\ Keeney Electric 

smelting of copper ores 976 

Ditto. . . .Possible applications of electric furnaces 

to Western metallurgy 686 

M 



MacDonald, William Vacuum filtration at Walhl 

mine 617 

Machine drilling contests Editorial.... 3 

Machinery trade In Switzerland 558 

Transported by muleback, sectionalized 838 

Maclaren. Malcolm. Ore formation and country rock.... 783 
Maclaren. Malcolm, and J. Allan Thomson . . . .Geology of 

Kalgoorlle goldfleld— I. II. III. IV, V 45. 95. 

187. 228. 374 

MacLeod. W. A Metallurgical tendencies In West- 
ern Australia 424 

MacNamara Mining Co., Tonopah, Nevada 665 

Cyanldation 758 

Magma mine, Arizona 199 

Magnet silver-lead mine, Tasmania P. G. Tait.... 102 

Magnetite. Montana 403 

Main Reef West Rand, Transvaal 114 

Maine. Mt. Katahdln 876 

Majestic Mines Co., Utah 74 

Malagult Dredging Co.. Philippine Islands 120 

Malaria, Its effect on work and workmen 

H. G. F. Spurrell 884 

Malay States, tin 570. 1001 

Mammoth mine, Maricopa county, Arizona 663 

Mammoth-Collins mines, Schultz, Arizona 116 

Mammoth Copper Co 408, 985 

Smelter fume suit 869 

Mammoth Mining Co 119 

Manchuria. Bujun coal mine in Reiji Kanda.... 856 

Manganese alloys, output of 750 

Ditto Editorial 709 

Poisoning by Editorial.... 42 

Virginia 14 

Manhattan Big Four 10-stamp mill shut down 947 

Manufacture of coke In 1912. .. .Edward W. Parker.... 480 

Of eucalyptus oil 382 

Mararoa. Western Australia 235, 433, 594, 835, 951 

Marlon Henry Mining Co., Colorado 985 

North Dakota mine. Colorado 829 

Marsh Mining Co.. Idaho 436 

Marvel Loch. Western Australia 594. 655 

Mary McKlnney Mining Co.. dividend 241. 664 

Mary Murphy Gold Mining Co., Ltd., Colorado 155. 508 

Maryland, mineral production 167 

Mineral production in 1912 973 

Mason Valley 983 

Mason Valley Mines Co., Terlngton, Nevada, 320. 636. 

787. 792. 992 

Montnna-Yerlngton property 871 

Report 908 

Smelter 317 

Mass Consolidated Mining Co.. Company report 478 

Massachusetts, mineral production In 1912 972 

Mathewson, E. P Basic-lined converter 61 

Mayflower Mining Co.. Company report 513 

McCune-Haegln Interests In Huanuco goldfleld, Peru... 511 

McDonald. M. Jaster, death of 747 

McDonald, P. B Mining In Northern Ontario.... 459 

Ditto Stoplng methods in Michigan mines.... 9 

McDougall roasting plant, dust chambers 978 

McEnaney mine. Porcupine 395 

Mclntyre. Cobalt. Ontario 910. 982 

Mclntyre-Porcuplne Mines Ltd.. Porcupine. Ontario. 780. 825 

Company report 37 

Mill 52 

McKlnley-Darragh-Savage Mines Co.. Cobalt... 112. 395. 

548, 702, 870 

Dividend cut 431 

McLaughlin. R. P Government prospecting.... 465 

McMahon. John, death of 949 

McQulsten tube concentrator 195 

Mechanical shoveling underground 840 

Mein. Robert M.. death of 703 

Melanochalcite 38 

Melting points of copper alloys 890 

Menzles Consols. Western Australia 433. 594. 835. 951 

Merton & Co.. Henry R.. lead and zinc statistics- 989 

Mesabl Iron range. Minnesota 916 

Messina copper mine, Transvaal 941 

Furnaces Editorial.... 517 

Messina Development Co.. Ltd., Transvaal 237. 430 

Metal, composite prices 793 

Market review. New York 32, 264, 396, 550, 704. 912 

Production, Arizona 78 

Production. Central States i 78 

Production, Idaho * 208 

Production. Mexico Editorial 252 

Production, Montana 208 

Production, Nevada 313 

Production, Oregon 480 

Production, South Dakota 404 

Production. Wyoming 404 

Metalgesellschaft statistics 915 

Metallurgical and mining terms, standardization of.... 

Editorial 673 

Research. Cobalt Edltoriad 214 

Tendencies In Western Australia 

W. A. MacLeod 424 

Metallurgy at Broken Hill J. Malcolm Newman.... 3(17 

In Rhodesia 881 

Metalurglca de la Baja California, Cla 943 

Metals, addition to free list Editorial 40d 

Mexican conditions, an English view of 

H. S. Denny 735 

Policy. President's and D. P. Barrows. .Editorial 797 

Mexican Development Co 94R 

Mexican Gold & Sliver Mining Co 394 

Mexican Metals Co 316. 4il 

Mexican mill, and Symmes agitator 92 



P.ig>-- 

Mexico, administration and 386 

Ditto Editorial 366 

And students Editorial 446 

Conditions In 7S, 202. 203. 243, 548. 666. 696. 936 

Ditto Editorial 42. 173. 599, 997 

Conditions in and Investors 195 

Conditions In and President Huerta's message 

Editorial 520 

Condltton^in, coin silver v. bar silver. .Editorial. .. . 841 

Conditions in currency Editorial.... 405 

Guanajuato dstirlct ore shipments 910 

Imports and exports Editorial.... 637 

Metal production Editorial 252 

Metal production for July 1913 Editorial 954 

Mineral exports through Agua Prieta 833 

Ore shipments through Agua Prieta 1032 

Railways 25, 203 

Security on investments Editorial.... 213 

Wireless telegraphy Editorial 291 

Mexico Mines of El Oro, Mexico 548, 911 

Company report 916 

Cyanidatfon ?. 759 

Miami Copper Co., Miami, Arizona, 315, 351. 522. 636. 

699, 784, 792, 868, 992 

Flotation 865 

Handling ore from stockpile at Miami 685 

Miami Royalty Co 739 

Mica, Virginia 15 

Micarta, Westinghouse company 838 

Michigan. Lake Superior strike, see Lake Superior — 

Mine fatalities 708 

Mineral production of 819 

Mineral production In 1912 1035 

Mines, stoplng methods In P. B. McDonald 9 

Microscope in mining D. P. Hynes.... 110 

Midas copper mine, Alaska 199 

Sold to Granby Con. M. S. & P. Co 828 

Mile, Kalgoorlle, Western Australia 45 

Mill, all sliming 136 

Concentrating, Magnet Silver Mining Co., Tas- 
mania 103 

Sears' Acme 128 

Wet-crushing and efficiency 838 

Miller. Willet G., and Cobalt, Ontario Editorial 754 

Milling. Agricola's De Re Metalllca 671 

And mining at the Vulture property 

W. M. Wood 1018 

At Cobalt Fraser Reid 216 

At Republic. Washington 278 

Cost at the Chlno 522 

Hardinge mills v. Chilean mills. .Robert Franke.... 223 

Human side of Gelaslo Caetanl.... 800 

Ditto Editorial 798 

In China, gold 227 

Low-grade and leasing at Cripple Creek 

Stephen L. Goodale 297 

Operations at the Eldorado Banket mine. Rhodesia. . 684 
Plants, underestimating the cost of — I, II. III. IV. . . . 

A. Sydney Additon 88, 138. 263, 301, 620 

Ditto Algernon Del Mar 777 

Ditto Editorial.. 291 

Ditto Charles T. Hutchinson 349 

Mills. Thomas Station. Missouri 738 



805 
261 
920 
934 
934 
996 



Milne, John, death of 244 

Mine car. Coeur d'Alene Ulysses B. Hough 1 

CoSt keeping C. M. Eye 

Examination in far countries Editorial.... 

Lamps, portable electric 62. 328, 

Ditto H. H. Clark 

Locomotive, largest 

Production of Colorado In 1912. by counties 

Charles W. Henderson. . . . 554 
Rescue and safety organizations. Lake Superior 

district • 1025 

Rescue stations and cars, United States Bureau of 

Mines appropriations 942 

Rescue telephone equipment, new 39 

Rescue work 642 

Safety and United States Bureau of Mines 

Editorial 954 

Signal system, electric E. A. Colburn, Jr 346 

Taxation in Colorado 824 

Ditto Editorial 797 

Taxation, Supreme Court decision 944 

Water, acid 

Water, copper from 854 

Mineral claims, patent on 90J 

Exports, Bolivia . . .. ■ • • •■ 467 

Flotation Wilton Shellshear 622 

Land in United States, patenting 597 

Land. Llndleys definition 557 

Land taxation, held by railroads, Montana 980 

Or an ore. value of 793 



Paint production 



Production. Alabama lj>l| 

Production, California 592 

Ditto Charles G. Yale 516 

Production, Colorado 930 

Production, Eastern Appalachian stat«* 167 

Production. Germany 1912 1035 

Production. Idaho 1912 1030 

Mineral production, Indiana Sib 

Production, Michigan »" 

Production Michigan 1912 1035 

Production, New Mexico 823 

Production. New York 310 

Production. North Carolina 404 

Production, northern Russia o'J 

Production. Peru In 1911 -■• '» 

Philippine Islands 79. 304 

Quebec 6" 

Texas in 1912 103a 

United States 1016 

... United States 1912 Editorial 954 

Production, Virginia in 1912.. Thomas L. Watson 898 

Production. Wyoming In 1912 1035 

Products, United States 1912 914 



Production. 
Production, 
Production. 
Production. 
Production, 



Products, new tariff on 

Resources of Virginia III .... 

Thomas Leonard Watson.. 

Specimens, free determination of 

Mineral Points Zinc Co.. Illinois . .... ........ . 

Mineralization and faulting In Goldfleld^ relation of 
Corrln Barnes and E. A. Byler.. 

Minerals In Honduras |J 

In Persia 



14 

902 
202 



Vol. 107 



MINING AND SCIENTIFIC PRESS 



13 



Mineral* Separation. Ltd.. and Butte * Superior. Hyde 

■ lull 

ore*, litigation 

A Superior 



ind Kim 



Hutte 
1 •>■ llavay 



f Wilton Shcllahear. . 



Unvay proc< 
Jamea_u. Ilyd 
Proct***, 
Procaaa, 

Mineral* Separation American Syndlcat 
ceaa of mineral flotation at Butt* 



Hraden «'<>pper Co. 

Broken Hill. New South Wale 



.370. 



Page. 

1S7 
941 

90S 

21 
903 
20 
331 



Mineral! Separation a> De Bavny'i 
Proprietary, Ltd.. dividend 



nnd Hyde pro- 
& Superior. . . . 
Editorial. . . . 



173 

Processes Auatralln 

580 

Miners and the Koreat Service Edltorlul 4K2 

Miner* Friend. Japanese contemporary 501 

Miners' aafety lamp*, use of James W. Paul.... 619 

v. technical men E. Lo Roy.... 537 

Mines and moving picture* 901 

And prospect*, securing; capital for..H. C. Cutler 822 

Hoisting men In 978 

Immigrants and Editorial 710 

Sampling coal 580 

Tonnage In United States and railroads 1021 

Un remunerative Rand 574 

Mines and Methods, publication suspended 

Editorial 405 

Mines Company of America 506 

Company report 360 

La Dura mine 741 

La Dura property closed 827, 833 

Mexico trouble Editorial 173 

Mines Department. New South Wales, receipts 311 

Mines Leasing & Development Co.. Canada. Rea mine. . . 739 

Mining and big exposition J. Nelson Nevlus.... 502 

And milling at the Vulture property 

W. M. Wood 1018 

And departments Editorial 842 

And law in West Virginia Editorial 43 

And metallurgical terms, standardization of 

Editorial 673 

And newspapers Editorial.... 798 

Are there jobs enough to go around? 

F. Sommer Schmidt 900 

Balkan Editorial 293 

By wholesale Thomas T. Read 368 

Claim patents 1028 

Columbia University lease Editorial.... 877 

Concessions. Colombia 980 

Conditions In western Chihuahua 936 

Costs at West End. Tonopah 272 

Educating the public regarding Editorial.... 560 

Engineers and geologists In the field, means of 

locomotion 902 

Equipment, real and personal propertv 597 

Exhibition, South Africa "..Editorial 753 

Experts and practical men Fred B. Ely.... 583 

In Algeria 891 

In Australia, deep 693 

In Gold Fields mines, selective H. H. Webb.... 860 

In Mongolia 232 

In Morocco 411 



. .P. B. McDonald 



In northern Ontario 

In Pennsylvania 

In Sweden 

In Western Australia 

Industry, Arizona 

Industry, lessons of the year in our 

J. A. Holmes. 

Industry, revival Editorial . 



■159 
990 
681 
618 
627 

680 
481 



Iron ore in Cuba 534 

Large scale gold Editorial...-. 879 

Law and the prospector Archie Huntoon. . . . 694 

Law, revision of the United States .. Editorial .... 560, 998 

Ditto Courtenay De Kalb 778 

Ditto C. W. Goodale 571 

Ditto Roval P. Jarvis 862 

Ditto M. D. Requa 571 

Ditto ..George Otis Smith 640 

Ditto Horace V. Winchell 571 

Ditto, a critique Robert M. Searls 1014 

Ditto A protest 601 

Ditto, a protest, Russell L. Dunn Editorial.... 637 

Ditto, again Editorial.... 600 

Law, Victoria, Australia 1024 

252 
152 
905 
256 
273 
500 

815 

954 
233 
427 
131 
822 
615 



Laws, Alaska Editorial. . 

Methods at Broken Hill 

On the Rand, deep 

On the Suan concession 

One reason for languishing. .. .J. Nelson Nevius.... 

Ordinance, new. Northern Territory, Australia 

Problems and the Mining Congress 

D. W. Brunton. . . . 
Railway and industrial enterprises, profits and the 

banks Editorial 

Reports .' Wilbur E. Sanders 

Schools and politics Charles A. Chase.... 

Ditto Editorial 

Some more reasons for languishing of .J. D. Vose. . . . 

Tin in Tasmania Peter G. Tait.... 

Mining and Metallurgical Society of America and 
affiliation with American Institute of Mining 

Engineers Editorial. . . .329, 

Gold medal award to H. C. Hooved and Lou C. 

Hoover Editorial.... 841 

New York section meeting 865 

Mining Bureau, California, industrial materials of 

California 

Mineral resources of state Editorial.... 

Mining Congress, mining problems and 

D. W. Brunton. . . . 

Resolutions of 

Minnesota, Cuyuna iron range 

Iron In 58, 



366 



207 
251 

815 
760 
S70 

553 

MesabI iron range 916 

Mineral land tracts Editorial. . . . 481 

Mint, San Francisco 324 

San Francisco, receipts 78, 990 

Mints, coinage at United States 21, 440 

Mississippian formation and co-operation in names.... S19 

Missouri, barytes in 4 93 

Concentrating plants 196 

Joplin district delinquent taxes 940 

Joplin district minerals ". 1021 

Joplin district, prospecting in 738 

Joplin district, shovelers' pay 940 

Kansas-Oklahoma zinc-lead field, 474, 543, 866. SS9, 1026 

St. Francois county strike 281, 319, 393 

School of Mines Editorial.... 131 



Zinc and lead production , , 

MIl*ul Co., Japan, picking bell* . 

Mocteiuma-Arlspe (Mexican Metnla) Development Co. 

Mocteiuma Copper Co., Nacoiarl, Sonora. Mexico. Slfl] 

636, 792, 

Modderfontcln government area*. Rand 

Model of Cripple Creek district, topograph!) . . . 



Puge 
814 

750 

833 

992 

198 



„ >Kl'»p 

B. A. Byler and Leo W. Davl* 144 

Modern plant for building pump* 212 

Modoc mine. California 661 

Mogul Mining Co.. Black Hills. South Dakota 35.1, 827 

Mohawk Mining Co.. Mohawk. Michigan 636, 792. 992 

Mond Nickel Co.. Ltd 215 

Big Levack property 944 

Levack properties 833 

Mond process, nickel smelting by A. P. Coleman.... 412 

Mongolia, mining In 23° 

Montagu & Co.. Samuel, silver statistics, 208, 245. 284, 

398, 551. 668, 748, 834, 913, 989 

Montana, Butte district, electricity In 597 

Coal In 28 

Georgetown mining district and the Southern 

Cross mine 546 

Hoisting at the North Butte mine 975 

Magnetite 403 

Metal output 208 

Nitre deposit 361 

Ores in 1912 226 

Phillpsburg quadrangle 393 

Sapphires 79, 94 

Taxing mineral lands held by railroads 980 

Zinc output and Wyoming gasflclds 824 

Montana Mining & Development Co 112 

Montana Power Co 315, 493 

Montana-Tonopah Mining Co., Tonopah. Nevada 665 

Commonwealth mine 355, 434 

Cyanldation 758 

Montana-Yerlngton property and Mason Valley Mines 

Co 871 

Montgomery-Shoshone Consolidated Mining Co., com- 
pany report 248 

Monthly copper production 635, 791, 991 

Morro Velho mill, Brazil, tube-mill liners at 423 

Mine 113, 403 

Temperatures at 380 

Morocco, mining In 411 

Mother lode of California W. T. Robinson.... 65 

Geologic work on 890 

Motor trucks 672 

Motors in coal mines, use of gasoline. . . .A. F. King. . . . 463 

Mount Bischoff Tin Mining Co., Tasmania 1018, 1024 

Company report 836 

Mt. Elliott, Ltd., Queensland, Australia 729 

Company report 1037 

Copper production 78 

Mount Katahdin, Maine 876 

Mount Lyell. Tasmania 625. 729. 1024 

Cost of producing blister copper 1021 

Metal production 78. 149 

Ore minerals 939 

Strike 867 

Mount Lyell Mining & Railway Co., Ltd., Tasmania, 

company report 1036 

Mount Morgan Gold Mining Co., Ltd., Queensland. 78, 

126, 625, 646. 729, 1024 

Ditto Editorial 251 

Company report 402 

Mine 327 

Mine, concentration and power for 296 

Mt. Roval, drilling equipment at 290 

Tunnel, Canada, drilling 327 

Mountain Copper Co., Ltd., California 545 

Mountain Queen, Ltd., Western Australia, 235. 425. 433, 

594, 655, 835, 942, 951 

Mountain Top Mining Co., Colorado 357, 399, 545 

Moving pictures and mines 904 

Muntz-metal sheets 170 

Murex Magnetic Co 26 

Muro Magnetic Co., Ltd., company report 513 

Mutual Mining & Milling Co.. Mexico 910 

Myers-Whaley shoveling machine. No. 11 mine, Federal 

Lead Co 94 7 

Mechanical shoveling underground 840 

Mysore, Kolar, India 694 

N 



Nacozari Consolidated Copper Co., Mexico 359, 

National Conservation Exposition, Knoxville. Tennessee 

Editorial. . . . 

National Copper mine, Mullan, Idaho 

National Railways of Mexico 

National tubing 

Natoma, California, dredging at 

M. W. von Bernewitz. . . . 
Natomas Consolidated of California 240. 545, 829, 

Cost and yield miscalculations Editorial 

Dredges 

Dredging 

Moving pictures 

Reorganization . 

Neal patent pebble-retaining outlet 

Nelchina placer district, Alaska 

Nelson, William, death of 

Nenzel Crown Point Mining Co.. Rochester Mining Co., 
and Rochester-Weaver Mines Co. consolidation. . . 

Neptune diving apparatus 

Nevada, American canyon, placer camp 

Gravel plant in 

Kennedy mining district 

Metal output 

Progress in potash prospecting in Railroad Valley. . . 

E. E. Free. . . . 

Yellow Pine mining district 

Nevada-Anaconda Copper Co., Nevada 

Nevada Cinnabar Co 

Nevada Consolidated Copper Co.. Ely, Nevada. 202. 358, 
636, 745. 783, 792, 827, 866, 871, 903, 

And oil-flotation process 

Blast-hole drilling in open-pit copper mining 

Bond , 

Dividends 

Report 

Safety department 

Nevada Douglas Copper Co., Mason, Nevada. 73. 112, 
317, 636, 745, 787, 792, 871, 947, 983, 



365 
73 
541 
172 

1017 
907 
878 
508 

1017 
904 
905 
515 
699 
703 

870 
128 
373 
58 
242 
313 

176 
357 
947 
119 

992 
243 
643 
904 
398 
831 
1031 

992 



14 



MINING AND SCIENTIFIC PRESS 



Vol. 107 



Page. 

Casting Copper mine 242. 220. »8J. 1030 

Copp«r leaching 127 

Ludwlg mine ........ 831 

Nevada HIIU Mining Co 72. 202, 394. 474. 744 

Cyanidatlon 759 

Nevada New Mines Co 243 

Nevada Wonder Mining Co.. company report 875 

Dividends 787 

Milling costs „ » »40 

Shaft sinking, cost of : 902 

Nevius. J. Nelson Mining and the big exposition.... 502 

Ditto One reason why mining languishes.... 273 • 

New drill 918 

Stretcher 796 

Tariff on mineral products €56 

Treatment plants In Rhodesia. .. .Owen Letcher.... 761 

New Arizona Copper Co. smelter 525 

New Canadian dredges. ..An occasional contributor.... 460 

New Canadian Nickel Corporation 215 

New Dominion Copper Co 351 

New Found Out. Rhodesia 761 

New Jersey, mineral production 167 

New Jersey Zinc Co 42. 981 

New Keystone mine. Gila county. Arizona 27 

New Kevstone v. Inspiration, Arizona 391 

New Klelnfonteln, Rand 114 

Ditto Editorial 44 

New Mexico. Bent, sandstone copper deposits at 

Sydney H. Ball 132 

Coal In 74 

Mineral production 822 

Mines in 65 

Stag Canyon disaster 702, 740 

New Randfontein mine. South Africa, iridosmine from.. 

C. Baring Horwood. . . . 49* 

New Reliance mine. Black Hills. South Dakota 826 

New South Wales. Broken Hill, selective flotation at. . . . 334 

Coal mine fatality rate 876 

' Co bar copper and gold field 300 

Gold production 581 

Mines Department 314 

Mining (amendment) Bill. 1913 625 

New tinfleld 1024 

Newcastle coal and oil 1024 

Newcastle coal exports 901 

New Tork gas production In 1912 733 

Metal market review 32. 204. 396. 550. 70«. 912 

Mineral production 167. 110 

New Tork. New Haven & Hartford railroad, history 

of Editorial 934 

New Tork Times' Annalist Editorial 798 

New Zealand. Auckland province, kauri-gum 1023 

Coal In 819 

Coal mines 1023 

Coromandel field 1022 

Gold and silver exports 1022 

Gold and silver production of Auckland province. . . . 494 

Gold dredging. South Island 1023 

Gold hydraullcklng 772 

Gold production 581 

Goldflelds. dredges 479 

Government control of strikes Editorial 600 

Haurakt peninsula. North Island, gold and silver 

production 682 

Karangahake district 1022 

Labor troubles 1022 

Mines, production 79 

Oil " 1023 

South Island dredges 729 

State aid to mining 773 

Thames goldfleld lOSi 

New Zealand Crown Mines Co., New Zealand 682. 1022 

New Zealand Oil Wells Co 1023 

Newcastle, New South Wales, coal and oil 1024 

Newhouse tunnel. Idaho Springs. Colorado 155 

Newman. J. Malcolm ... .Metallurgy at Broken Hill.... 307 

News and news Editorial.... 756 

Newsboy Mining Co.. Alaska 544. 699. 784 

Newspapers and mining Editorial.... 798 

Nicaragua, Camp Bird. Ltd. 1033 

Railroad construction Editorial.... 674 

Nlchol6. Horace G.. Geevor tin mine discussion. Institu- 
tion of Mining and Metallurgy. London 979 

Ditto Inclined baffles.... 823 

Nickel in Norway 35 

In United States 838 

Ore district. Sudbury Editorial 21S 

Production. Ontario ' '. 982 

Smelting by the Mond process A. P. Coleman.... 412 

Virginia '. 14 

Nickel Plate. British Columbia 395 

Niemann patent process for treatment of selenlte ores. . 943 

Nigeria, northern, tin production 500 

Niplsslng Mines Co 195. 216. 354. 365. 542. 630. 

782, 825. 982, 1032 

And New York as a silver market 506 

Cvanldatlon 759 

Dividends 591 

Desulphurizing Cobalt ores 484 

Ditto Editorial 483 

Nlssen and ordlnarv stamps. Cornish mines 695 

Nitrate. Chilean Editorial 482. 518 

Fields of Chile Walter S. Tower 495 

Lands. Chilean sale 36 

Of soda, production decrease 874 

Nitre deposit Montana 360 

Nitrogen atom, trailing Editorial 447 

South America 327 

Supplies Juan Blanquier 777 

Nitrogen Products Co.. water-power in Iceland 361 

NobletL R. Simple smelting 820 

Nome. Alaska, gold find 355 

Shortage of water 160 

Storm at 588. 627. 699. 828 

Ditto Editorial 659. 710, 797 

Norseman district. Western Australia, mining 235 

North American smelting works, an excursion to 

Ferdinand Heberleln 713 

North Anantapur Gold Mines. Ltd.. Kolar. India 694. 695 

North Broken Hill. Ltd- company report 993 

North Broken Hill Mining Co.. company report 360 

Mine, operating costs 940 

North Butte Mining Co. .., 196. 241. 242. 541 

Company report 744 

Mine. Montana, hoisting at 9.d 

North Carolina, mineral production 167. 404 

North Columbia Gold Mining Co.. Atlln district. Brit- 

ish Columbia 614 

North Dakota, mineral production 1912 889 



Page. 

North Dakota mine. Colorado 829 

North Lyell mine, Tasmania, fire and flooding 1021 

North Star Mining & Milling Co.. Jarbidge. Nevada. 66S. 

702. 831 

North Star Mines. Grass Valley. California 161 

Dividends 663 

Rock-drill testing 

Robert H.' Bedford and William Hague 179 

Ditto -A- Editorial 174 

North Washington Power & Reduction mill. Washing- 
ton, cyanldatlon 759 

Northern Ontario, mining in P. B. McDonald.... 459 

Northern Concentrators. Ltd.. and Chambers-Ferland. . . 826 

Northern Longitudinal Railway. Chile Editorial 997 

Northern Ontario Light & Power Co 783 

Northwestern Development & Mining Co.. endowed 

prospecting Editorial.... 842 

Norway, ore production 1912 35 

Sulitjelma company 618. 732. 854 

Nova Scotia, coal mine fatality rate 876 

Isaac's Harbour, gold discovery 982 

Nundydroog. Kolar. India _ 694 

Nutter. Edward H.. .. .Working costs at the Standard 

Consolidated 312 



Oaks Co.. New Mexico 519 

Offin River Gold Estates, company report 595 

Ohio, mineral production 861 

Ohio Copper Co.. Bingham. Utah. 55. 112. 236. 237. 276. 

510. 541. 586. 636. 666. 792. 904. 992 

MilL Utah 987 

Oil burning in furnaces Herbert Lang.... 64 

Discovery. Athabasca Landing, Canada 903 

Discovery. Black Diamond. Alberta. Canada 903 

Flotation process. Nevada Consolidated Copper Co... 243 

Gas. explosive characteristics 443 

Gold and coal production of Dutch East Indies 310 

In Alaska 742 

In Colombia Editorial 559 

New Zealand 1023 

Operations. California 906 

Production. California 199. 544 

Production for 1913. California J. H. G. Wolf 579 

Production from shale 554 

Production in 1912 552 

Production in Peru 181 

Production. Japanese 186 

Reserves discussion. SouthAustralla 1024 

Resources of California Editorial.... 559 

Rush. Athabasca Landing. Alberta 1025 

Territory. Colombia 1032 

Wells, waste in 'coming In' 403 

Oilfield. Tayabas. Philippine Islands 780 

Oilfields. California 279. 356 

Oklahoma, coal production In 1912 240 

Kansas-Missouri zinc and lead district, ore product- 
Ion 543. 866. 889. 1026 

Mine telephones 403 

Natural gas production 851 

Olancho country. Honduras A. D. Akin 49 

Old Dominion Copper Mining & Smelting Co.. Globe. 

Arizona 636. 792, 992 

Improvements at 61 

Smelter 524 

Old Ironsides Mining Co 506 

Old Sandstorm Annex Gold Mining Co. v. Goldfleld 

Consolidated Co 701 

Oliver Iron Mining Co 102j 

One man drill 69- 

Reason why mining languishes. J. Nelson Nevius.... 2j4 

Ontario Bureau of Mines 112 

Ontario. Canada, accident statistics 46 

Cobalt bullion production 987 

Cobalt. Willet G. Miller Editorial 754 

Gold production 8|j 

Mineral output 586 

Mineral production 983 

Mining in northern P. B. McDonald 4»9 

Production - - - - - • 112 

Sudburv. stoping drills at Albert E. Hall 310 

Ooregum, Kolar. India 694 

Operation of the Great Boulder mill. Kalgoorlie 3.3 

Of the West End mill. Tonooah. .J. A. Carpenter. ... 191 

Ophir Gold Dredging Co.. California 357. 868 

Ophir Silver Mining Co- Nevada, report 1030 

Ora Banda. see Associated Northern — 

Orange Free State diamond production . ------ - - • • ■ *l 

Ore Charles H. Herzlg 427. 537 

Ditto T. A. Rlckard.... 427 

Crushing underground f»6 

Deposition Eaitorjs.1 406 

Deposits, primary and secondary Editorial 920 

Deposits in depth, persistence of ............ 

Horace V. Winchell 332 

Deposits in depth, persistence of. International Geo- 
logical Congress at Toronto Editorial.... 330 

Dressing, colloids in A. W. Allen 109 

Formation and country rock 733 

Gate, new GT * n £I}; SSS" ' ' i?l 

Genesis Editorial »18 

In discovery, prospectors and 838 

Market. Joplln J|7 

- Mineral or. value of ggf 

Passes, steel at Broken Hill John M. Bridge 773 

Reserves of Australian mines 655 

Reserves of Rand mines 79 

Sampling from a rock-crusher 876 

Oregon, metal production 480 

Mining in eastern zsz 

Ores considered with especial reference to gel and rich 

heavy metal ores, primary and secondary 

P. Krusch 41s 

Desulphurizing Cobalt Editorial 483 

Electrostatic separation of. Huff method 70s 

Enrichment In depth fji 

Genesis of Butte Editorial 446 

Orient, transportation In - - - - - - - - -»» 

Oriental Consolidated Mining Co.. Korgj. mJ 

Costs at l\l 

Cyanide plants 

Spares used In mills ;52 

Work of the mines Alf Welhaven 857 

Origin of Butte chalcoclte .Reno Sales. . . . 4»3 

Of lead. zinc, and silver In the_Cqeur d Alene-^J. 

n 



Oscar H. Hershey 489, 529 



Vol. 107 



MINING AND SCIENTIFIC PRESS 



1.. 



.933. 



. .» Hi. 



Oriole mine, Oregon 

oro Grande Hold Mining Co.. Incorporated !! ! 

i>ro Mining Co. and Clio mine. California 

Oro Wuter. i « Power Co.. California .. 

Camancho dredge 

Orovllle dredge' 

Dredging eompanlea. morgor '. 

Orovllle Dredging Co.. Ltd. a. 476. Mo. 588. 'siY 

Company report 

Dividend and del. la 

Orovllle Dredging. Ltd. .V.V.V.V.V.V.V.'.'." 

Company report ^••^••^11 

Statement of operations 

Oroya Kluek Hunge mlti.'. .-osts at. Weatern Australia!! 

Oroya Leonesa mine. Nicaragua 

Oroya Llnka. Western Australia. 335. 433, 694, «65 8S5*. 

Mill 9U - 

Mines. evunldntlon 

Orak Goldllelda. Ltd.. Siberia t JJ« 

Osceola Consolidated Mining Co.. Osceola. Michigan, 186. 
- , 590, 624. 630. 713. 792. 

Osgood quarts mine, California 

Osmlrldlum In Tasmania '1'5'g' 

Platinum, a new alloy p. Zlmmormunn. . . .' 

Otnvl Mines & Hallway Co.. company report , 

Ouray Colorado, oro shipments 281 

Ouro Preto Gold Mines of Brazil. Ltd.. company re- 
port 

Output of gold J. R. Flnl'ay!!!' 



in 

1031 
••« 
•46 

8(8 
•40 
700 
«<> 
•45 
1037 
•80 
»48 
«3 
870 
869 
934 
788 

1024 
424 

780 
827 

992 
589 
862 
533 
556 
689 

80 
536 



Philippines Dredging c 
I'lilllpaburg 



Page. 

1033 



Pnchuca tnnks F C Brown 

Pacific Gold Dredging Co 

Pacific Mines Co.. New Mexico 

Paige. Charles L. Common sense of the fumo 

question 

Paint, mineral production 

Panama Canal, dredging 48 288 

Excavation 

Expenditures 

Flooding Culebra cut 

Locks 190, 

Locks and works, concrete laid 

Progress at 

Work at Cucaracha slide 

Pannma-Paclnc International Exposition, engineering. . 

Editorial 

Paracale district. Philippine Islands, dredges 

Paringa Mines, Ltd.. Kalgoorlle 235 

Park City district, Utah 

Production 

Parker. Edward W....Coal mining in Pennsylvania..!! 

Ditto Gas In New York In 1912 

Ditto Manufacture of coke in 1912.... 

Ditto Mlchlga'n mineral production.... 

Passing of La Lucette Editorial.... 

Patent, cancellation of 

Filter. Tonopah Belmont mill 

On mineral claims 876. 

On mining claim. Arizona 

Patenting mineral land In United States 

Patents. Alter Editorial 

Recent 873, 995, 

Paterson strike Editorial 

Paul. James W Use of miners' safety lamps. . . . 

Pazos y Saclo. Vlncente. .. .Smelting in shaft furnaces 

at great altitudes 

Pearl district, Idaho, ores and treatment of - 

Pearl Lake. Canada 

And Jupiter 

Pelican mill, Colorado 

Pond Oreille Mining & Reduction Co., Webster mine 

Penn Canadian 

Penn Mining Co., Campo Seco, California 

Smelter, fume complaints 

Penn copper mine. Calaveras county, California, cop- 
per from mine water 

Pennsylvania, anthracite production 

Coal In 

Coal mining in 

Mineral production 

Mining in 

Natural gas consumed 

Pennsylvania Gold Mining Co.. California, De Bernadl 

suit 

Periodicity of the stock market 

Perserverance, Great Boulder, Western Australia, 235, 

433, 

Mill, cyanidatlon 

Persia, minerals in 

Persistence of ore deposits in depth. International Geo- 
logical Congress at Toronto Editorial.... 

Ditto Horace V. Winchell 

Peru. Huanuco goldfield 

Mineral production in 1911 

Mining claims 

Oil production in 

Prospecting conditions in — I. II 

Charles S. Haley and C. A. Rodegerdts. . . .922, 

Peterson Lake Mining Co 

Petrol imports into Great Britain 

Petroleum in Philippines 

Investigations, United States Bureau of Mines 
appropriations 

Production in 1912 of the United States and the 
world David T. Day.... 

Production in United States 124. 

Production. Taiwan 

Petrologic provinces 

Ditto Editorial 

Phalen. W. C Potash salts.... 

Phelps. Dodge & Co.. Inc 636. 792. 

Extra dividend 

November copper production Editorial.... 

Stag Canyon disaster 702. 

Philippine Islands and independence Editorial.... 

Dredging by Australian companies 

Gogo juice in panning gold-bearing sand 

Mineral production 79. 

Mining news 

New government policy, affect of 

Order of Carabao and sentiment as to present gov- 
ernment policy Editorial.... 

Paracale district, dredges 

Petroleum in 

Tayabas oilfield 



976 
588 
832 

539 
399 
306 
977 
56 
488 
403 
978 
306 
977 

482 
780 
433 
691 
119 
404 
733 
480 
819 
330 
949 
904 
902 

inns 
597 
877 

1039 
214 
619 

145 
66 
388 
112 
700 
879 
739 
897 
984 

854 
12 
990 
404 
167 
990 
720 

637 
311 

556 
759 
452 

330 
332 
511 
79 
126 
181 

967 
782 
210 
337 

942 

633 
942 
898 
521 
518 
12 
992 
9S0 
877 
740 
406 
1033 
361 
304 
120 
780 

953 
780 
337 
780 



383 

501 
838 
210 
>4» 
750 



I'llllpabiirg qiiii.h ,n t . . M..111..1,,, 

ri.osnhato. Africa . ....2| r 1 — 

Florida 

l'hosphote, Tennessee „ " 

I'l.ihlsla Prevention Commute*, Rand 

II. king b.-lln 

I'lerce and Smith converter 81 

Pig Iron production of Germany • 817 

Iron production United States 210. 818 

Tin 9ij 

Pioneer electric locomotives In Alaska 918 

Pllot-Butto Mining Co.. v. Anaconda Copper Mining 

Co. 059 

I'ln.'Krov.. (!.. Id Mining Co.. Nevada !»K3 

Pioneer Consolidated Mines Co., Nevada 881 

Pioneer Gold Mines Co 663 

Pioneer Tin Mining Co.. Ltd., Tasmania 615 

Pitch-blende In Colorado 166 

Kadlum from, St. Joachlmsthal, Austria . , , 403 

I'ranlum quoted In Germany 973 

I'lxley & At., ii report on gold und sliver 186 

Silver statistics ' 1084 

Placer camp, re-awakenlng of an old 

Ernest G. Locke 373 

Deposits of copper 135 

Districts, Alaska, distances to new 1028 

linldllelil. Slbolln creek, British Columbia .1117 

Gold production, Alaska 836 

Miners and pork-knockers 1021 

Mines In New Mexico 65 

Mines. Valdez Creek George W. Slas.... 728 

Mining In Siberia 425 



Placers. Alaska gold 

Innoko-Idltarod, Alaskn 

Plain talk on land law revision . .George Otis Smith. 

Plans of the Alaska Juneau Gold Mining Co 

F. W. Bradley. 

Plant, building a reduction Herbert Lang. 

For testing efficiency, simple A. T. Tye. 

In Nevada, gravel 

Metallurgical, at Chuqulcamata Editorial. 

Plants, concentrating, Missouri 196 

New treatment. In Rhodesia Owen Letcher.... 761 

Underestimating the cost of milling — I, H. Ill, IV.. 

88. 138. 201. 263. 

Ditto Algernon Del Mar.... 

Ditto Editorial 

Ditto Charles T. Hutchinson.... 

Platinum-osmium, a new alloy F. Zlmmermann . . . . 

Russian 581 

Platoro, Colorado, new townslte 508 

Plumbago, Ceylon 249 

Plymouth Consolidated Mine, California 700, 785, 945 

Poderosa Mining Co., Ltd., Bolivia, company report 287 

Diamond-drilling at C. L. Severy. . . 

Poisoning by manganese .' Editorial... 

Poles, telephone, telegraphic, and power transmission. 

Political careers, American Editorial... 

Politics and mining schools Charles A. Chase. . . 

Porcupine. Ontario, gold production 



876 
819 
640 



4 

53 
58 
.43 



620 
777 
291 
349 
638 



338 
42 
978 
214 
427 
825 

Stamp-mills . " 197 

Porcupine Crown, Cobalt. Ontario 739. 910. 982 

Crown Reserve Co 780 

Porcupine Syndicate 782 

Pork-knockers 1 021 

Portable burners 052 

Electric lamp 328 

Electric mine lamps H. H. Clark 62. 934 

Sub-station 1040 

Portland Canal Tunnels. Ltd 115 

Portland Gold Mining Co., Cripple Creek. Colorado 162 

Dividends 241. 629. 743. 986 

v. Stratton's Independence. Ltd 43o, ^06 

Portland Mining Co.. Prosperity. Missouri S66 

Possible applications of electric furnaces to western 

me a urg! ^, ( ; r jgy ' A ' ' Lyon R 0Der t M. keeney. . . . 686 

Possibilities of grinding pans 

John Randall, M. W. von Bernewltz 234 

Possibly a joke w V.V ; 

Potash deposits. Searles Lake H. S. Gale 5« 

Field, Germany ". 10 

Prospecting In Railroad Valley, Nevada, progress 

In E. E. Free 176 

Salts, Imports of 

Salts in United States, sources of 12 

Potassium and sodium, cyanide of, on free list . ......... 

Editorial. . . . 517 

Potterv Imports, United States in 1912 619 

Production, United States 

Powder, black, and dynamite, analysis of 

Powell, L. W.. death of j,Vii ; 125 

Power and concentration for the Mt. Morgan mine -'96 

Available. Willow Creek district. Alaska 337 

Hydro-electric. Japan "*n.t 

Plant at Associated mine, Kalgoorlle . 

M. W. von Bernewltz. ... 316 

Transmission. Mysore. Tndia 327 

Praetorius. one rope aerial tram Editorial.... 

Precipitate, white, in zinc boxes 

Precipitation of gold by manganous salts......... 

A. D. Brokaw 



793 



Of gold in orebodies 

Preparation of primers . . . ....... ■ ■ 

Preparatory work of the Alaska Gold Mines Co. ... 

Grant H. Tod . 

President Huerta's message ..Editorial. 

Pressure in chemical reactions, role of. . . . . . ...... 

John Johnston . 



149 
309 



184 

520 



01 
670 



Prestea Block A.. Ltd.. company report 

Preston-East Dome properties »Jj 

Preventing the spread of names UJ.VV'.ii "i" 

Prices and quotations V°i ' ' ' 

Primary and secondary deposits of ores at Butte ... 

And secondary orebodies ...Editorial... 

And secondary ores considered with especial refer 

ence to the gel and rich heavy metal pres. . 

P. Kruscn . . . 

Primers, preparation of ......... .... - ■ • ■ 

Prince Consolidated Mining & Smelting Co « 

Company report 

Production statistics: 

Antimony 

Asbestos in United States 

Arsenic 



130 

453 
920 



418 
975 
29 



250 
669 
250 



Arsenic, white, 'in United State's in 1912 622 

Bismuth v.v V ' ;■ 'iA4« Tr7 

Cement in United States in 1912 i>>' 



16 



MINING AND SCIENTIFIC PRESS 



Vol. 107 



Page. 

Coal in Kentucky 939 

Colorado, mineral production 930 

Copper ores In 1912 707 

Fuller's earth 835 

Gas In New York In 1912 733 

Gas, natural 707 

Gas, natural. In Oklahoma 851 

Gold and silver in 1912 848 

Gold placers, Alaska 876 

Gypsum 250 

Idaho, metals . jt 208 

Idaho, mineral production . ^ 1030 

Iron and steel 707 

Iowa, mineral production 930 

Michigan, mineral production 819 

Michigan, minerals in 1912 1035 

Montana metals 208 

New Mexico, mineral production 823 

Ohio, mineral production 861 

Pennsylvania, mineral production 990 

Pyrlte In United States In 1912.. 149 

Quicksilver in 1912 167 

Salt and bromine 444 

Sand and gravel 444 

Selenium 250 

Smelter and refinery products In 1912 598 

Talc and soapstone 250 

Texas, minerals in 1912 1035 

Zinc and lead in Missouri 814 

Professional ethics Gelaslo Caetani 429 

Ditto Victor G. Hills 976 

Ditto J. M Lllllgren 821 

Progress at Buckhorn mine 452 

Progress at the Hidden Creek copper mines 691 

In fuel utilization Editorial 638 

In potash prospecting in Railway Valley. Nevada... 

E. E. Free 176 

Progress Mines of New Zealand, Ltd 634 

Company report 555 

Prospecting by the Government. .. .Marshall Bond 582 

Ditto Albert Burch 349 

Ditto Editorial 331 

Ditto R. P. McLaughlin 465 

Ditto G. L. Sheldon 820 

Conditions In Peru — I, II 

Charles S. Haley, C. A. Rodegerdts 922, 967 

Endowed Editorial 842 

Gravel, dredging operations 902 

Prospector, mining law and the Archie Huntoon 694 

Voice of the 682 

Prospectors and ore in discovery 838 

Prospects and mines Editorial. . . . 251 

Prosperity, big business and Industrial 

C. R. Van Hlse 730 

Providence Mining Co., Missouri, water pumped 830 

Psychology of zinc F. L. Clerc 63 

Ditto R. G. Hall 273 

Ditto Frank L. Wilson 428 

Pulp, watering wheel for 339 

Pump, Frenler " 703 

Use during shaft-sinking 978 

Pumping at the Comstock A. M. Walsh 305 

Pumps, modern plant for building 212 

Pyrlte in Norway 35 

In United States, production 140 

Synthesis of Alfred R. Whitman 928 

Pyrltic smelting 147 

Pyrrhotite, analyses of 126 



Page. 

Future of mining 604 

Gold output 982 

Gold stealing 126 

Health conditions 504 

Labor In 390, 982 

Mines, cyanidatlon 757 



Quartette property. Clark county, Nevada 242 

Quebec, mineral production of 554 

Queen of the Hills, Western Australia 

„ 235, 433. 594. 655, 951 

Queen Victoria mine, British Columbia 1032 

Queensland, Anakie, sapphire fields of 

_ Lionel C. Ball 151 

Charters Towers gold and silver production 854 

Charters Towers goldfleld 627 

Coal area 210 

Gold production 581, 774 

Quicksilver and lighthouse lights, Scotland 708 

Occurrence In United States 82 

Ores, treatment of 1021 

Production, California 161, 210 

Production In 1912 167 

Recovery from ores 348 

Quicksilver Mining Co 315 

New Almaden mines 71 

Qullp mine. Washington 867 

Qulncy Mining Co., Hancock, Michigan 

281, 590. 636, 743, 792, 992 

Quotations and prices Editorial 130 

R 

Radium 403 

From pitchblende, St Joachtmsthal. Austria 403 

Geologists' time recorders 393 

In Colorado 838 

Ores in Australia 232 

Price 762 

Radium Hill mine. South Australia 232 

Railroad company freight decision of Supreme Court... 

Editorial 920 

Construction. Nicaragua . . . Editorial.... 674 

Railroad Valley Co., Nevada 547, 630 

And potash deposits 176 

Railroad Valley, Nevada, progress In potash prospect- 
ing In E. E. Free.... 176 

Railroads and transportation problems of Bolivia 

G. W. Wepfer 100 

In United States, mines tonnage 1021 

Montana, and mineral land taxation 980 

Raiiwav construction In Alaska Editorial.... 252 

In Mexico 25, 203 

United States 304 

Rand banket— I, II, III, III con., IV. V, VI. VI con.. 

VII C. B. Horwood 

563. 604. 647, 676, 721, 763, 779. 806. 956. 1003 

Ditto F. H. Hatch 1019 

Ditto Henry H. Knox 899 

Ditto Stephen J. Lett.... 899 

Ditto Editorial. T. A. Rlckard 561, 711 

Conditions and future outlook H. S. Denny.... 383 

Deep mining on the 905 

Diseases, Colonel William C. Gorgas to study 

Editorial 710 



Mines, ore reserves 

Mines, unremuneratlve 

Phthisis Prevention Committee * 

Scarcity of jiative labor 

Selective m%iing 

Ditto Editorial 

Selective mining v. working cost 384 

Strike 30. 114. 432, 604 

Ditto Editorial 44, 

Tube-mills ; 443, 



79 
574 
249 
982 
249 
365 



365 
479 



Wages on 311 

Rand Mines. Ltd 198 

Randall, John Grinding-pan practice.... 737 

Ditto Possibilities of grinding pans.... 233 

Raven Copper Co., Montana 114, 118, 543 

Ray Consolidated Copper Co., Ray, Arizona. .. .239, 398, 

622, 525, 636. 792, 827, 828, 903, 992 

Company report 326 

Dividend rate 944 

Read, Thomas T Copper smelting practice In the 

Southwest 521 

Ditto Mining by wholesale.... 368 

Panama-Pacific Exposition, department of mines and 

metallurgy. Eastern representative. .Editorial. .. . 954 

Ready Bullion mine, Juneau, Alaska 945 

Re-awakening of an old placer camp 

Ernest G. Locke 



373 

Recovery of quicksilver from ores 348 

200 
466 
216 
906 



889 

575 

993 
778 
571 
862 
571 
640 
571 
lull 



Redding. California, fume trouble 

Reed, H. W Forest service.... 

Reld, Fraser Milling at Cobalt 

Rellly, J. J., v. Seneca Mining & Milling Co 

Reindeer Copper & Gold Mining Co., and Copper Queen 

Mining & Milling Co., Ltd 72 

Reindeer-Queen Mining Co., Idaho 509 

Reiner Mining Co.. California ^..239, 946 

Relation of faulting and mineralization in Goldneld.. 

Corrin Barnes and E. A. Byler. ... 59 

Reopening the Hillabee mine, Alabama 107 

Republic district, Washington 591 

Republic, launching a Editorial.... 519 

Republic Mines Corporation 278, 320 

Dividend 358 

Requa, M. L., Horace V. Winchell, and C. W. Goodale. . 

Revision of United States mining laws. . . . 571 
Requa-Savage Gold Mining Co., Colorado, Beacon Hill 

properties 701 

Research and the university Editorial.,.. 753 

Resolling after dredging. Australia 494 

After dredging In California G. L. Hurst 719 

Resolutions of the Mining Congress 760 

Retardation phenomena in the solution of gold and 

silver In aqueous cyanide solutions 

Reverberatory-f urnace flues, waste heat boilers In 

S. Severln Sorensen. . . . 

Revision of the United States mining law 

Editorial 560, 

Ditto Courtenay De Kalb .... 

Ditto C. W. Goodale 

Ditto Royal P. Jarvls.... 

Ditto M. L. Requa.... 

Ditto George Otis Smith. .. 

Ditto Horace V. Winchell.... 

Ditto — A critique Robert M. Searls. 

Ditto — A protest 601 

Ditto — A protest, Russell L. Dunn Editorial. . . . 637 

Ditto — Again 600 

Rezende mine. Rhodesia 1027 

Rhode Island Copper Co., company report 555 

Rhodesia, Broken Hill deposit 276 

Gold production of mines 79, 581 

Labor In 390 

Metallurgy in 381 

Mines, gold production 209 

Mining operations, 1913 1027 

New treatment plants In Owen Letcher 761 

Southern, gold output 390 

Southern, mineral production 660 

Rhodesian Chamber of Mines, quarterly meeting 660 

Rice. George S Hoisting cage, new.... 172 

Rlckard. T. A Ore 427 

Ditto Rand banket — Editorial 561. 711 

Ditto Water in veins. . . . 693 

Ditto Winter work In Alaska.... 110 

Rico properties. Colorado 946 

Rio Plata Mining Co., Chihuahua, Mexico 936 

Rio Tlnto Copper Co.. Spain, dividend 695 

Riverside Portland Cement Co 557 

Robinson. W. T Mother Lode of California.... 65 

Robinson Deep mine. Rand 166 

Rocher de Boule Copper Mining Co., British Columbia. 

and Butte capital 980 

Rochester, Nevada, ore production 162 

Rochester Consolidated Mines Co.. proposed 870 

Rochester Hills Mining Co.. Nevada 744 

Rochester Mines Co.. Nevada 831 

And Guggenheim interests 665 

Rochester Mining Co.. Rochester-Weaver Mines Co., and 

Nenzel Crown Point Mining Co., consolidation. . . . 870 

Rock-crusher, sampling ore from a 876 

Rock-drill testing at North Star Mines .... Editorial 174 

Ditto Robert H. Bedford and William Hague.... 179 

Rock-drilling contests 29, 108, 210, 288, 437, 479, 615 

Rock, ore formation and country 733 

Salt. Louisiana 876 

Rodegerdts. C. A., and Charles S. Haley Prospecting 

Condition in Peru— I. II 922. 967 

Role of pressure in chemical reaction 

John Johnston.... 501 
Rooiberg Minerals Development Co.. Ltd., company re- 
port 993 

Rooke-Cowell. John Leaching of copper ores 294 

Rope transmission 443 

Rosarlo mill, Honduras, cyanldation 759 

Rosas mine. Sardinia Editorial.... 41 

Ross Goldflelds. Ltd., South Island. New Zealand 1023 

Ross. Louis, v. A. C. Burrage suit 866 

Rossland ore production 158 

Rotarv roasting furnaces 597 

Rothwell. John E Inclined baffles 194 

Round Mountain Mining Co., Nevada, dividend and liti- 
gation 202 

Ore crushing underground 856 



Vol. 107 



MINING AND SCIENTIFIC PRESS 



17 



Royal Basin kilning Co.. Montana fit 

Hoy»l Dutch-Shell company antl Trlnlilatl Ollflelda. Lid. 

Editorial.... 41 

Royal School of Mine*. England, appolntmcnta (OS 

lloyal Standard mlno. Auatralla 656 

Ruby dlatrlct. Alaaka HI* 

Output l»IJ 901 

Ruby mine, Montana 194 

Ruby < ! ul.li MIiiIiik Co. M. .iiiiiim. tin- In . \..nc.l,- pli.nl 6CI 

Ruby Silver Mlnlnic « Development Co.. Nevada Gil 

Ruaala. aabeatoa 312 

Copper deposits 023 

Hold mlnlnic regulation Editorial. . . . 073 

Mineral production of Northern 584 

Orenburg dlatrlct Hold mlnei 081 

Platlnm 581 

Rutlle (titanium). Virginia 15 



Safety and health first Editorial 

And Sanitation Congress, International. Editorial. .. . 

And Sanitation. International Exposition of 

_, Editorial 

Klectrlc switches for mines H. H. Clark.... 

In mining. Slag Canyon disaster Editorial 

In tunneling 

Lamps, use of miners' James W. Paul . , 

Organizations and mine rescue. Lake Superior dis- 
trict 

Signs, universal J. \v. Stonehouse! ! 

secondary and primary orebodles Editorial. 

St. Francis Lead Co.. Potosi Lend Barytes & Mercantile 

Co.. and Potosi Miners Co 

St. Francis county. Missouri, strike 281, 319, 

St Joachlmsthal. Austria, radium from pitchblende... 
St. John del Hey Mining Co.. Ltd.. Brazil 

_ M ' 36, 113, 209. 360. 

Gold production 

St Joseph Lead Co Dwlght A. Jones.... 

And Doe Run Lead Co., consolidation 

St. Louis Mining Co.. Montana 

St. Mary's Mineral Land Co., company report 

Sales. Reno Origin of Butte chalcoclte 

Saline Valley Salt Co.. aerial tramway 

Salisbury House, London 

Salt and bromine, production in United States...!.!!! 

Deposition, dry lake theory 

P'tto Editorial. . . 

In Virginia 

Rock in Louisiana 

Salt Lake Stock Exchange figures , 

Salting of alluvlais, successful C. S. Haley 

Salvador, Central America, gold and silver bullion 

Sampling coal mines 

Ore from a rock-crusher 

Sand and gravel, production in United States 

Glass, grinding, and furnace, production 

Sand Queen mine, Western Australia. .. .235, 433. 594, 

655 835 

Sanders. Wilbur E Mining reports. . . .' 

Sandstone copper deposits at Bent, New Mexico 

Sydney H. Ball 

Sandstorm Annex Gold Mining Co. v. Goldfleld Consoli- 
dated Milling & Transportation Co 

San Antonio district, Baja California 

San Francisco district, Utah, geology of 

San Francisco. Engineers' Club, new quarters 

Editorial. . . . 

Mint, receipts 78, 324, 

Stock and Bond Exchange, report of business trans- 
acted 

Sanitation and disease in new countries .. Editorial ... . 

And Safety, International Exposition of 

Editorial 

Loan. Ecuador Editorial.... 

Mine 

San Juanes Reduction Co., Baja California 

San Poll Consolidated Co., Washington 

San Rafael y Anexas. Mexico, cyanidation 

Santa Gertrudls Co., Ltd., Mexico 351, 358, 

Company report 

San Toy Mining Co., Mexico 

Sapphire fields of Queensland, Anakie 

Lionel C. Ball 

In Montana 79, 

Sapulpa mine, Missouri 

Sauerman Bros., excavator 

Schists, graphitic, Kalgoorlie 

Schmidt, F. Sommer Are there jobs enough to go 

around? 

Schrader, Erich J Slow-speed Chilean mill data.... 

Schrader, F. C. discovers alunite 

Scottish Gympie Gold Mines, Ltd., company report 

Searls, Robert M Revision of the mining law — a 

critique 

Searies Lake potash deposits H. S. Gale.... 

Sears' Acme mill 

Sebeca Superior. Porcupine. Ontario 

Securing capital for mines and prospects 

H. C. Cutler 

Selective flotation Editorial.... 

Flotation at Broken Hill 

Mining in the Gold Fields mines ... .H. H. Webb .... 

Mining on the Rand 

Ditto Editorial. . . . 

Mining on the Rand v. working cost 

Selenium in gold ores 

In United States 

Seneca Mining & Milling Co. v. J. J. Reilly 

Seneca Superior, Canada 

Seoul Mining Co., Korea 251, 

Seven Troughs Coalition, Nevada 

Severy. C. L Diamond-drilling at Poderosa mine, 

Bolivia 

Shaft-sinking, Nevada Wonder mine, cost of 

Sinking, pump use during 

Toe guards 

Shafts at Cripple Creek, depth of 

Sinking and lining of Francis Donaldson.... 

Shamva Mines. Ltd., Rhodesia 381, 761, 

Company renort 

Shamva mine, Western Australia 

Shannon Copper Co., Metcalf. Arizona 111, 636, 792, 

904, 

Company report 

Smelter 

Sharp Leasing Co.. Washington 

Shasta countv, California, copper belt 



955 
965 

214 

262 
674 
1016 
019 

1025 
503 
920 

687 
393 
403 

380 
679 

16 
586 
114 
513 
453 
210 
113 
444 
176 
173 

15 
876 

74 
1000 
580 
580 
876 
4 14 
480 

951 
233 



870 
913 
547 

798 
990 

669 

877 

214 
841 
106 
943 
867 
759 
980 
948 
511 

151 
94 
830 
685 
516 

900 
136 
443 
993 

1014 
56 
128 
197 

822 
445 
334 
860 
249 
365 
384 
943 
250 
906 
739 
552 
908 



338 
902 
978 
978 
743 
844 
1027 
286 
425 

992 
325 
524 
867 
408 



Mh.Tf.'.U'i. ,) ': , ^ , * l "M , - Vu ' c » n mines... W. H. Storm..... ''"Joi 

Mhaltuck Arizona Copper Co., Blabee. Arizona. .630. 7»!, >93 

luvidend 

■sh'Tr-., 1 *: kii •■ y «""«n for an' •Ir^ilft! ! ', '. Ml 

Shearer 4 Mayer excavator 

oniiSSJi;. 9' iVr.V. OuVBrnint.nl prospecting «so 

Shellal ear. Wilton.. Mineral notation... 022 

v " to Minerals .Suparutlon v. De Uavay process 21 

Shorldnn camp, Washington 817 

sherlll Porcupine Uold Minus. Ltd., Ontario 74 I 

Mierman, E. A Forestry sorvlco 193 

Mierman Act 731 

Shoveling machine, Myera-Whaloy, No. it 'mine,' Fed- 
eral Leud Co 047 

Underground, mechanical !.!.! !. 840 

Shushana rlvor dlatrlct. Alaska... 60, 230, 366, 391, 627' 946 

Editorial 329 

Canadian Geological Survey report 607 

Distance ami routes to " 1028 

Glacier trail to oSS 

Output ! Us 

Siamese Tin Syndicate, Ltd., company report !!!! !! 837 

Sla8. George W Valdcz Creek placer mines 729 

Siberia, Atbasar and Spassky copper properties 680 

Dredging by hand In J. ,lm Power llut.-liiiix . s 1 :i 

Lena Goldffelds property 084 892 

Placer mining in 426 

Slbolla creek, British Columbia, placer-gold Held 697 

Sicily, sulphur Industry of 15 

Sierra Nevada Mining Co., Nevada * 745 

Silica brick 838 

Value and sale of 838 

Slit from harbors In British Columbia, cost of removing 443 

Silver, Alaska 355 

And gold bullion, Salvador, Central America 580 

And gold exports, New Zealand 1022 

And gold In aqueous cyanide solutions, retardation 

phenomena In the solution of 889 

And gold in 1912, production of 848 

And gold, Japan 512 

And gold mines listed In LTnited States 838 

And gold, Pixley and Abell report 166 

And gold production, Auckland province, New Zea- 
land 494 

And gold production, Charters Towers. Queensland. 854 

And gold production. United States 477 

And gold transactions 398 

Arizona, production 78 

Bolivia 100 

Cobalt, Ontario 321. 459 

Coin v. bar. Mexico Editorial.... 841 

In 1912, sources of 874 

Industry, Cobalt and Canadian Mines Department 

investigation 903 

Lead, and zinc in the Coeur d'Alene. Origin of — I, 

II Oscar H. Hershey 489. 529 

Lead mine, Magnet, Tasmania P. G. Tait. . . . 102 

Market, New York and Nlpissing 506 

Nevada, production 313 

Ontario, production 982 

Ores, cyanidation 758 



.James J. Denny. 



484 

20 S 
898 
665 
168 
1031 



Ores, desulphurizing at Cobalt 
. Statistics 

Taiwan, production 

Utah, production in 1912 

Silver King Coalition Mines Co., Utah, company report 

Dividends 987. 

v. Silver King Consolidated Mining Co.. attorney's 

fees Editorial .... 

Silver King Consolidated Mining Co., Utah, dividend... 

Silver King Mining Co., Arizona 544 

Silver Lake lead mine, Colorado 628 

Silver Mining & Leasing Co., Nevada 787 

Silver Standard mine, Washington 437 

Silverstream mine, New Zealand 1023 

Siiverton district, Colorado, shipments 319, 473 

Simmer & Jack mine. Rand, costs, stope filling 902 

Simmer Deep, Ltd., Rand 905 

Company report 286 

Simple plant for testing efficiency A. T. Tye. 

Smelting R. Noblett. 

Smelting in Arizona D. Thomas. 

Simplification of gold ore treatment. .. .A. W. Allen. 

Ditto John B. Stewart. 

Sinking and lining of shafts .... Francis Donaldson 

In wet ground Editorial. 

Skip, home-made self-loading and dumping water.. 

H. E. Wharton. 

Slag losses in copper smelting Editorial. 

Slime agitation H. B. Wright. 

Briquetting at Anaconda 

Cakes from filter media, dislodging 



481 

358 



53 
820 
503 
254 
466 
844 
843 

461 
330 
464 
838 
935 

Collector. Daly-Judge mill, Utah 270 

In cyanide mills, treatment of, Duncan parents.... 29 

Tables, Deister No. 3, speed 902 

Thickeners, increasing the capacity of 654 

Slocan district, British Columbia, production of mines. 437 
Slow-speed Chilean mill data. .. .Erich J. Schrader.... 136 
Sludge from mining operations, law in Victoria, Austra- 
lia ■" ,|J 

Treatment, Missouri 1"6 

Sluicewav linings, steel W. W. Edwards 852 

Smelter fume Editorial 329 

Fume problem, California 391, 408, 43a. 984 

Smelting at Campo Seco, California 

M. W. von Bernewitz 

Belgian furnaces in zinc George C. Stone 

By the Mond process, nickel A. P. Coleman. 

Complex sulphide ores 9'4 

Complex sulphide ores to save all metals 

Editorial 

Copper slag losses in Editorial 



897 
931 
412 



953 
330 



Cyanide precipitate 793 

Electric, of copper ores 

In Arizona, simple D. Thomas. 

In Australia, zinc 

In shaft furnaces at great altitudes 

Vincente Pazos y Sacio. 

In Texas ' Editorial. 

Of copper ores, electric Editorial, 

Ditto . . . .Dorsey A. Lyon and Robert M. Keeney. 

Of tin ore, electric 578 

Practice in the Southwest, copper 

Thomas T. Read 



355 
503 
776 

145 
41 
675 
976 



521 



Pyritic 

Reverberatory, at Cananea, cost of 

Shasta county, California j." ■ir-Wil' 

Simple ■ R- Noblett. 

Works, an excursion to North American 

Ferdinand Heberlein. 



522 
280 
820 



1* 



MINING AND SCIENTIFIC PRESS Vol. 107 



517 
900 
448 

582 

822 



Page. 

Works at Grand Forks. British Columbia 733 

Smith, George Otis Geologic work on the Mother 

Lode 890 

Ditto Plain talk on land law revision.... 640 

Smith, Sumner S Lode mining in Willow Creek dis- 
trict, Alaska 335 

Smith and Pierce converter 61 

Smoke question, smelter, California 391. 408, 435, 984 

Snake Creek tunnel, Utah 548 

Snelling, California, dredging aU # 1002 

Snowstorm Mining Co., Idaho . 241 

Dividend .T 73, 358 

Soaks and gnamma holes, Western Australia 516 

Soapstone and talc 260 

Socfedad Beneficladora de Condoriaco, Ltd., Chile J746 

Society and the Institute A member of both.... 638 

Socorro Mining & Millfhg Co., New Mexico 

316. 394, 5X0, 665, 787, 832 

Soda, nitrate of, production decrease 874 

Sodium and potassium, cyanides of. on free lost 

editorial 

Sohnleln, M. G. F Grlndlng-pan practice. 

Solution control In cyantdatlon A. W. Allen 

Control in cyanldation James S. Colbath 

Some more reasons why mining languishes 

J. D. Vose 

Sonoma Magnesite Co., California, railroad 946 

Sonora, Mexico, mines 75, 238 

Sons of Gwalia, Western Australia 235, 425, 433, 

594, 655. 835. 911 

Cyanldation 768 

Plant overhauled 739 

Sorensen. S. Severln. . .Waste heat boilers in reverbera- 

tory-furnace flues 575 

Socorro mine, New Mexico 909 

South Africa, mining exhibition Editorial 753 

Union of. Diamond production 642 

Victoria Falls, Zambesi river 708 

South America, aerial tramway across Andes mountains 978 
American enterprises and American manufacturers. 

Editorial 518 

Mineral wealth unknown Editorial.... 86 

South Australia, oil reserves discussion 1024 

South Banner Mining Co., California 544 

South Carolina, mineral production 167 

South Dakota. Black Hills, mineral production 826 

Black Hills mines 660 

Dead wood assay office, transportation charges on 

bullion 826 

Metal production 404 

National forest timber sales, Lawrence county 827 

New 'blue sky' law 826 

South Eureka mine, California, dividend 700 

South Kalgurli Consols, Western Australia. .. .235. 433. 

594, 655. 835, 951 

South mine. Broken Hill. Australia 634 

South Mount Cameron mine. Tasmania 616 

South New Moon mine. Australia 662 

South Utah Mines & Smelters. Newhouse, Utah. 636. 792. 992 

Company report 442 

South Wales, coal production 536 

Southern Cross mine, Montana 546 

Southwest, Copper smelting practice in the 

Thomas T. Read 521 

Southwestern Miami mine, Arizona 318, 699 

Spain, electric power cost 126 

Spanish American Iron Co.. Cuba 543 

Spares used in mills, Oriental Consolidated 940 

Spassky Copper Mines, Ltd., and Atbasar copper proper- 
ties. Siberia 580 

Company report 125 

Specific gravity bottle and dilatometer, combination.. 

C. A. Browne 348 

Spelter 912 

World production in 1911 and 1912 915 

Splcer, H. N Baffles 429 

Spilsbury, P. G Symmes agitator.... 467 

Spokane-Arizona zinc mines 1 60 

Springfield Tunnel & Development Co., California. .628. 1029 

Spurrell, H. G. F Malaria; its effect on work and 

workmen 

Stag Canyon Coal Co.. New Mexico, disaster 702. 

And safety in mining _. Editorial 



884 
740 
674 

Stamp-duty. Talisman mill. New Zealand 344 

462 

695 



Stamp-mill of the past 

Stamps. Nlssen and ordinary, Cornish mines 

Winona mill. Lake Superior, velocity cards 361 

Standard Consolidated Mining Co.. Bodle, California. 

cyanldation 759 

Working costs at Edward H. Nutter. . . . 312 

Standard Oil, dividend 440 

Standard Silver-Lead Mining Co., Ltd., British Colum- 
bia 243. 987 

Dividend 358. 910. 987 

Steel and iron industry of Canada Editorial. 174 

And Iron output of Italy 528 

Hardening in Germany 762 

Iridium, analyses 940 

Ore passes at Broken Hill John M. Bridge.... 773 

Points for core-drilling, use of 194 

Soft and wrought iron 793 

Sluiceway lining W. W. Edwards 852 

Steel Corporation, unfilled orders 679 

Steptoe Valley Smelting & Mining Co.. McGill, Nevada, 

Stirling and Babcock & Wilcox boilers 575 

Sterrett. Douglas B Gems mined In United States in 

1912 • 

Stewart. John B Simplification of gold ore treat- 
ment 466 

Stewart Mining Co., Idaho 586. 590. 664 

Company report 478 

Dividend '. 358. 1030 

Earnings 201 

Stirling boiler 6 



Page. 

Mine taxation test case y44 

v. Portland Gold Mining Co 435. 506 

Stretcher, a new 796 

Strike, Butte 315. 320 

Colorado coal miners 545, 589, 664, 700, 740 

830, 869, 907 

Ditto Editorial 445. 518, 673 

Ditto, and editor's resolution Editorial. .. .797, 842 

Ditto, and Sherman anti-trust law Editorial.... 954 

Ditto, and ^ferendum vote 946 

Lake Superior ...162. 174. 241. 275, 319, 352, 393, 436. 

473, 505, 509, 546, 586, 590, 664, 785, 870. 908. 986, 1026 

Ditto Editorial 674 

Ditto, and Citizens' Alliance 998 

Ditto Editorial 878 

Ditto, and New York copper 195, 246 

Ditto, and one-man drill 692 

Ditto, and picketing Editorial 518, 599 

Ditto, and shareholders' loss in dividends 

Editorial. ... 954 

Ditto, and women Editorial.... 445 

New Zealand 1022 

Paterson. New Jersey Editorial.... 214 

Rand 30, 114. 432. 504 

Ditto Editorial 44, 365 

St. Francois county, Missouri 281. 319, -393 

Strikes and fair demands Editorial.... 215 

Government control of Editorial.... 600 

Strontium minerals 170 

Suan concession, mining on the 256 

Sub-station, portable 1040 

Success Mining Co.. Idaho, dividend 358 

Property valuation 241 

Successful salting of alluvlals C. S. Haley.... 1000 

Sudburv district, Ontario. Canada 948 

Geological Congress at Editorial.... 215 

Sloping drills at Albert E. Hall 310 

Suez canal, shipping in 1912 82 

Sugar beet, pulp residue 288 

Mills, cyanide from residue of C. A. Browne 1S6 

Sulletjelma copper mine, Norway 35, 618. 732, 854 

Elmore vacuum plant 373 

Sullivan angle-compound air-compressors 

Fred D. Holdsworth 795 

Sullivan Machinery Co 795 

Sulman-Teed patent Editorial.... 407 

. Sulphide ores, smelting complex 974 

Ores, smelting complex to save all metals 

Editorial 953 

Sulphide Corporation. Broken Hill. Australia 493 

Sulphides, flotation from ores 
Sulphur as a fertilizer 
- Deposits, Wj 
In Louisiana . 

In smelter fume ■- 341 

Ditto Editorial . . . 

Industry of SlcUy 

• Production, cost of 2 

Production. Taiwan 898 

Production. United States in 1912 126 

Sulphuric acid cinder, utilizing 1«;3 

Acid leaching Editorial 252 

Acid leachlne oxidized copper ore with 253 

Acid production • 1*3 

Sumatra island. Dutch East Indies, Ketahoen mine 
\i r ages ...--•»•■•»•...-•••••■■•»••••»•■•■•••■»••• 

Sumitomo copper smelter, fume 150 

Sunflower Cinnabar Mining Co.. Arizona, quicksilver... h!>9 

Sunnyside Mines Co.. Colorado 946. < 01 

Sunrise adit. Mountain Top Mining Co.. Ouray, Colo- 

rado. cost of driving 399 

Sunshine property. California 661 

Superior & Boston Copper Co.. Arizona 276. 0O8. ,81. 906 

Company report ■ • • • |»| 

Timbering ;;.-•.*. • ■ i 1 '_•»»■ *- s 

Superior Copper Co.. Calumet. Michigan. . .^. .246. 393. ^ 

Surlgao Gold Mining Co.. Philippine Islands 120 

Surinam, gold in ■ »H» 

Surprise mine. Washington 591 

Swansea Consolidated Gold & Copper Co.. Arizona .. 1 •>". 94 j 

Sweden, mining in if} 

Swindler. Frank P.. death of iji 

Switzerland. Machinery trade In 

Sydney. Australia. Stock Exchange, new rule »»i 

Svdvarangar Iron Ore Co.. Norway ............... 

Svmmes agitator G. Spilsbury 

Dltto Whitman Symmes 



94 



Babcock and Wilcox boilers. . . -Hervey Gulick. 



864 



Stock market, periodicity of 311 

Stone. George C. .Belgian furnaces in zinc smelting.... 931 

Stone. G. H Extralateral right.... 820 

Stonehouse. J. W Universal safety signs.... 503 

Slope filling, costs. Simmer & Jack mines. Rand 

Stoning drills at Sudburv. Ontario. .Albert E. Hall 

Methods in Michigan mines P. B. McDonald 

Underhand, with square sets. Broken Hill Propri- 
etary mine, Australia 

Storms W. H Trlnlty-Balaklala-Vulcan mines, 

Shasta county. California 40R 

Stratton estate v. United States 435 

Stratton's Independence. Ltd.. Cripple Creek. Colorado. - 

1 1 K, 1 U ft 

Cyanldation 760 



3in 

9 



634 



382 
379 

Deposits^ Wyoming 144 

392 
2 
15 



940 



35 
467 
92 

Svnnntt and others v. Tombstone Consolidated Mines 

Co Ltd 355 

Synthesis' of pyrlte Alfred R. Whitman 928 

T 

Tailing and ore treatment at Broken Hill. Australia 

Placer county. California 

Question, decisions ■ ■ • ■ 

Treatment. Cornwall. England .• 

Tait P. G Magnet silver-lead mine. Tasmania.... 

Ditto Tin mining In Tasmania.... 

Taiwan, mineral production 

Talc and soapstone * a - V 

Talisman Consolidated, Ltd., New Zealand. .494, 682. 890. 
Company report - 

Tamarack a Minlng fJa. Calumet. Michigan. . 285, 636. 792, 

Tanalyk Corporation, Ltd.. Siberia 

Company report 

Tanana valley. Alaska, output 

Tanks. Pachuca F. C. Brown 

Taotiah Mining & Exploration Co.. Ltd.. West Africa... 

Company report 

Tariff on mineral products, new 

Protective . - A Editorial.... 

Tasmania, bismuth-tin-wolfram ores 

Hvdro-electrlc scheme wi."fii.Vi 

Magnet silver-lead mine P. G. Tait. 

Mineral production ._• • ■ 

Osmlrldlum ••• ••• ■• ■ .-• 1;,b « 

Tin mining In . .... .P. G. Tait. . . 

Taxation of mines. Supreme Court decision 

Of mining properties. South Dakota 

Technical men v. miners ...E. Le Koy 

Techow. Walter •• .Trent agitators. . . 

Teck-Hughes mine, Kirkland Lake. Canada, change of 

owners • ■ £••!' ■ 

Tekka, Ltd Federated Malay States, company report.. 
Telegrapty. wireless, Mexico Editorial 



104 

280 
169 
352 
102 
615 
898 
250 
1022 
325 
344 



623 
837 
906 
976 
892 
993 
656 
517 
461 
557 
102 
170 
662 
615 
944 
157 
537 
385 

903 
125 
29t 



Vol. 107 



MINING AND SCIENTIFIC PRESS 



l'H|(r 

Telephone equipment, new mlns-rescue St* 

Mine. Oklaltumi 403 

Tellurtde ores, cyenldatlon 7&9 

Tellurtde (lultl Mines. Ltd.. Ktrkland Lake. Canada..-. 

Tvllurlde Mining Oa>, Arlsona hhH 

Tellurldes Editorial S<6 

Kulgoorllc K.>l.|ii.-l.| 47, 37b 



& Hud 



Json Bay Mining Co., Canada 739 

. " 904 

Morro Velho. Hraill 380 

167 



Ttwliaamlni 

And Domv Lak« 
Temperatures at the 
T«nn«iiN, mineral production 

I'hosphute deposits 310 

Tennessee Copper Co.. Copperhlll, Tennessoo . . 036, 741. 

792. 992 

Texas, coal mining 69* 

Iron ores of, brown Editorial 41 

Mineral production In 1912 135 

Thorn, W. T Mineral products. United States.... 914 

Thomus, L> Simple smelling In Arlsona... 60H 

Thomas, Klrby Zinc ore deposits In Boone 

and Marlon counties. Arkansas 864 

Thomson, J. Allun. and Malcolm Muclaren Geology 

of Knlgoorlle goldllelds — I, II, III. IV, V % 

45. 95. 187. 228. 374 

Tlgre Mining Co.. Mexico SOS, 359, 511. 911 

Company report 1032 

Timber, seasoning 978 

Timbering, underground, rules In Lake Superior district 901 

Tin, kMuvIuI. and bucket-dredges 623 

And wolfram exports, Kedurateu Malay States 536 

And line ores, experiments In England and Prance.. 818 

Exports, Dutch Bast Indies 210 

In Bolivia 100, 417 

In Virginia 14 

Malay 570 

Malay States 1001 

Mining In Tasmania Peter G. Talt. . . . 615 

Ore dressing, Cornish mines, Nlssen and ordinary 

stamp* 695 

Ore, electric smelting of 578 

Producer, China as a 646 

Pig 912 

Production. Northern Nigeria 500 

Wolf ram-brsmuth ores from Tasmania 461 

World production. 1911 and 1912 915 

Tin Cup Gold Dredging Co.. Colorado 117. 743 

Titanic mine. South Dalcota 157 

Tltanlferoas Iron ores of United States 570 

Tobln bronze i 82 

Tod. Grant H New ore gate... 152 

Ditto. .Preparatory work of Alaska Gold Mines Co.. . 184 

Tode stone 838 

Toll. Rensselaer H I.:. Plata mountains, Colorado.. S49 

Tom Reed mine. Arizona 116, 356, 906 

Tomboy Gold Mines. Ltd., Telluride, Colorado 

201, 319. 545. 743 

Mill 876, 907 

Shareholders 905 

Tombstone Consolidated Mines Co.. Ltd., v. Synnott and 

others 355 

Tomklns Cove Stone Co.. New York 368 

Tonopah and "U'alhl deposits, comparison 941 

Tnnopah district. Nevada 74. 119. 282^ 320, 344, 357. 

474, 510. 546. 630. 665. 702, 871. 947. 986, 10.10 

Tonopah Belmont Development Co., Nevada 

289, 474. 590. 665, 702, 793, 871. 98C. 1030 

Cyanldatlon 758 

Dividend 398. 947 

Earnings 68 

Filter patent 904 

"Tonopah Extension Mining Co.. Nevada 787 

Cyanldatlon 758 

Dividend 39S 

Tonopah Merger Mines Co.. Nevada 210, 474. 665 

Tonopah Mining Co.. Nevada 202, 474, 702. 787. 871 

And Continental Mining Co 114 

And Desert "Power & Mill Co.. v. Joseph A. Vincent 

Editorial. . . . 292 

Dividend 195, 202 

Tonopah T7orth Star Tunnel & Power Co.. Nevada, frau- 
dulent certificates 237 

Tonopah Placers Co.. placer claims. Colorado 102fi 

Tonopah "Victor Mining Co.. Nevada 38S 

Topographic model of Cripple Creek district 

E. A. Byler and Lee W. Davis. ... 144 
Tough Oakes mine. Kirkland Lake district. Ontario, 249, 

624, 788 

Tower. Walter S Nitrate fields of Chile 495 

Trailing the nitrogen atom Editorial.... 447 

Tramway, aertal. across Andes mountains. South 

America 97s 

Irvinebank aerial 382 

Transportation on Orient 26R 

Problems in Bolivia . G. W. Wepfer. 

Transvaal, diamond production 
Gold production 



. 694 

Transporting coal in China 973 

642 
581 



Mine operations ' 1*>6 

Transvaal Gold Mining Estates. Ltd.. company report..' 670 

Treatment at Broken Hill, tabling and ore 101 

Plants 1n Rhodesia, new Owen Letcher.. . 761 

Tree in United States, largest 875 

Tregidgo, Alfonso A., death of 244 667 

Trent agitator 92, 126 

PJtto Donald F. Trwin 821 

V 1tt " ...Walter Techow 385 

At West End mill, Tonopah 191 

Replacing machine 172 

Trethemey Cobalt Silver Mines Co., Ontario 542. 666 

Dividend 910 

Tri-Bulllon Smelting & Development Co., company re- 
port 402 

Trimountain Mining Co.. Michigan 590 

Trinidad Oilfields. Ltd Editorial 41 

Trinity-Balaklala-Vulcan mines. Shasta eountv, Cali- 
fornia W. H. Storms 408 

Tripoli 250 

In Missouri 387 

Tripolite. fuller's earth 793 

Troitzk Goldfields. Ltd.. company report 595 

Trojan mine. Black Hills 826 

Tronoh Mines, Ltd., Malay peninsula, company report. . . 80 

Trucks, motor 672 

Tube-mill calculations : 580 

Ditto Editorial 919 

Discharge 1040 

Liners at the Morro Velho mill. 'Brazil 423 

Kreinfontein mine and 55 

Rand 443, 479 

Tubing, National 172 



I'age. 

Tularosa Copper Co., New Mexico 11S> »4I 

Tungsten filaments, drawn ,, 310 

Ore production In United States und world 190 

Tunneling, safety In 1016 

Tuolumne Copper Mining Co.. Butte, Montana. 71, 71, 

79. 114, SUB. 389, 4S« 

Tuolumne Deep Channel Mining Co., California 03H 

Turquoise. Arlsona 391 

Tuscumblu Mining Co., Idaho, and ldora lllll Mining 

Co 785 

Twenty -One mine, California 101 

Tye, A. T Simple plant for testing efficiency. . . , 53 

u 



Underestimating ll<o co«t of mining plant* — I. II, HI. IV 
A. Sydney Addlton 88, 138, 263. 301, 

Ditto Algernon Del Mar.... 

Ditto Editorial . . . . 

Ditto Charloa T. Hutulilnaon . . . . 

Underwriter* Land Co., Joplln, Missouri 

University of California, W. W. Bradley gift to College 

of Mining 

I'ranlum. geologists' time recorder* 

Pitchblende, quote In Germany 

Union Sulphur Co., Louisiana 

Unit, dcllnltlon of 

United Copper Mining Co., Washington 278, 386. 

And Iron Horse claim 

Dividend 

United Verde Copper Co 

United States, business conditions In 

Bureau of Mines, appropriations 

Coal mine fatality rate 

Geological Survey, mineral production, 1912 

Editorial. . . . 

Geological Survey, work of 

Gold and silver production 

Mineral production 

Mineral products. 1912 

Nickel In 

v. Stratton estate 

United States Phosphate Co 

United States Smelting, Refining & Mining Co.. 636. 792, 

Alaska properties 

Dividend 

Huff electrostatic plant • ■• .... 

United States Steel Corporation ....42. 206. 

United Verde Copper Co., Jerome, Arizona. .636. r S4 . 792. 

Smelter ■■• ••• • ■ .-j- 62 °. 

Universal safety signs J. W. Stonehouse 

University, relation to research Editorial 

Unremuneratlve Rand mines 

Urals, asbestos deposits ■■ ••• ........ 

Mineral development of Editorial 

Platinum I'n'm 

Use of gasoline motors in coal mines. . . . A. F. King. . . . 

Of miners' safety lamps James W. Paul.... 

Utah, metal production in 1912 ■ • • ■ 

Park City district , 

San Francisco district. Beaver county, geology of... 
Utah Apex Mining Co.. Utah, company report 
Utah Consolidated Mining Co.. Bingham, Utah.. 636. 792, 

Utah' Copper '^'i^^^^-'^jSk^ 'Hi 

Company report 

Dividend 

Magma mill 

Utah Fuel Co • 

Utah Metals Mining Co.. tunnel 

TTtah-Wvoming Consolidated Oil Co 



620 
777 
291 
349 
866 

954 
939 
973 
869 

1021 
987 
832 
368 
984 

1026 
942 
876 

964 
939 
477 
1016 
914 
838 
435 
119 
992 
741 
541 
666 
440 
992 
526 
503 
753 
574 
628 
482 
581 
463 
619 
665 
987 
547 
909 
992 
74 

992 
326 
398 
832 
734 
196 
910 



Vacuum filtration at Walhi mine • ■ ••• ■ • • • , 

William MacDonald .... 617 

Valdez Creek Placer Mines Co., Alaska . . . . 94 5 

Ditto George W. Sias. ... 729 

Vancouver island, metal mining v;', - 

Van Hise. C. R Big business and Industrial pros- 

perity .■ i'VY'-i 07c 

Vanners, concentrate in collecting boxes, draining sin 

Frue ;•■ 876 

Vats, galvanized corrugated iron, for cyanide plant.... 

Vattler. Carlos Iron ore deposits of Chile 

Veins, water in •'■ F. Kemp.... 

Ditto T. A. Rickard .... 

Venezuelan Oil Concessions. Ltd.. Mr. D. E. Alves' ad- 
dress Editorial 

Vermillion Silver & Lead Mining Co., Montana IIS 

Victor Mining Co.. Cripple Creek. Colorado 473 

Victoria, Australia, cost of mining deep leads . 79; 

Dredging in 1912 r 52S 

Gold production 581 

Mineral returns for 1912 6i„ 

Sludge from mining operations, law 94 

Victoria Copper Mining Co.. Michigan 590, 664 

Victoria Falls. Zambesi river. South Africa 

Victoria State Coal Mine, Australia 

Victorious mine, Associated Northern Rloeks Co.. West- 
ern Australia. .235. 42fi, 433. 469. 594, 626, 781, 835, 
Village Main Reef Gold Mining Co.. Rand, company re- 
port 478 

Selective mining 249 

Vincent. Joseph A., v. Tonopah Mining Co.. and Desert 

Power & Mill Co Editorial 292 

Vindicator Con. Gold Mining Co., Colorado, dividend. . . . 

'", , . 241, 743, 907. 

Virginia, mineral production 167 

Mineral production in 1912 Thomas L. Watson 898 

Mineral resources of — Iir 

„ Thomas Leonard Watson.... 14 

Vogelstein & Co., L. copper statistics 632. 7R9. 1934 

Lead report 741* 

Spelter report V3' 74 9 

Tin statistics 76. 245, 632, '749! 950 

voice of the prospector 6g;> 

Volatilization process. Gwalia Consolidated mine West- 
ern Australia 249 

von Bernewltz, M. W Dredging at 

Natoma, California 

Ditto Grinding-pan practice.'. . . 737 

Ditto Hoisting at a Chinese mine. . . . 

Ditto Lead salts in cyanidatlon. . 

Ditto Possibilities of grlndlng-pans 

Ditto Power-plant at Associated 

mine. Kalgoorlie 345 



479 

893 
93 R 
693 

919 



708 
867 



942 

1017 
901 
193 
757 
2.14 



20 



MINING AND SCIENTIFIC PRESS 



Vol. 107 



Page. 

Ditto Smelting at Campo Seco, California. . . . 897 

Vose, J. D borne mure reasons why 

mining languishes I 822 

Vulean-13alak)ala-Trlnity mines. Shasta county, Cali- 
fornia W. H. Storms 408 

Vulcan coal mine. Newcastle, Colorado, explosion 1032 

Vulcan Mining, Smelting & Reltning Co., Nevada 745 

Vulture Mines Co.. Arizona 279, 943 

Mining and milling W. M. Wood 1018 

W 

Wages on the Rand 

Wagner Azurite Copper Co., Arizona 

Wagner Mining Co., California 

Walhl and Tonopah deposits, comparison 

Walhl Gold Mining Co., Ltd., New Zealand 

494. 617. 682, 

Walhl, Now Zealand 

Cyanldatlon 

Kilter plant, sampling cakes 

Mills. New Zealand, precipitation of gold from cya- 
nide solutions on zinc wafers 

Mine, vacuum filtration at.. William MacDonald . . . . 

Victoria mill flow-sheet 

Walhl Grand Junction, New Zealand 682. 1022, 

Walhl-Paeroa Extraction, New Zealand 494, 682, 

Waltawheta Gold Prospecting Co.. New Zealand 

W r ales, colliery disaster at Cardiff Editorial.... 

Wallaroo mine. Australia, copper production 

Walsh, A. M Pumping at the Comstock. . . . 

Wanakah Mining Co., Colorado 

Wang, C. Y An -Chi ironfleld 

Warringer, R, C Crown Mines.... 

Washington. Covada mining district mineral deposits.. 

Cowlitz River valley, coal resources 

Republic district 

Sheridan camp 

Winter school of mines. Washington State College. . 

Washington Water Power Co 

v. Federal M. & S. Co '. 

Wasp No. 2 Mining Co.. Black Hills. South Dakota.. 506. 

Dividends : 353. 506, 

Mill, belt-conveyors 



Mine 



Waste heat boilers In reverberatory furnace flues.. 

S. Severln Sorensen .... 

Water, acid mine 

Copper from mine 

Gauge. Improved automatic 

In veins J. F. Kemp. . . . 

Ditto T. A. Rlckard.... 

Skip, homo-made, self-loading and dumping 

H. E. Wharton 

W r atson. Thomas I- Mineral production in 

Vlrglna in 1912 

Ditto Mineral resources of Virginia.... 

Wealth of Nations mill. New Zealand, cyanldatlon 

Weaver. Charles E Cordova mining district. 

Washington, mineral deposits 

Weavervllle quadrangle. California 

Webb, H. H Selective mining In the Gold 

Fields mines 

Welhaven. Alf Work of the Oriental Consolidated 

mines 

Wepfer, G. W Railroad and transportation 

problems In Bolivia 

Ditto Transportation problems in Bolivia. . . . 

West Africa, dredges on Gold Coast 

Mines, geld production 17. 581, 

West Australian Gold Mines. Ltd.. In Porcupine district. 
West End Consolidated Mining Co., Tonopah. Nevada.. 

474. 665. 745. 871. 

Company report 

Concentrate 

Costs " 210, 

Mill, cyanldatlon 

Mill, operation of Jay A. Carpenter.... 

West Joplin district, mining In 

West Mexico Mines Co.. Bala California 

West Ontario Consolidated Mining Co. and Daly Mining 

Co 

West Virginia, coke production 

Law and mining In Editorial.... 

Workmen's compensation law Editorial. . . . 

Western Australia, dividends paid by mining companies. 

Geolocv of Kalgoorlle Goldfteld— T. IT. TIT. TV. V 

Malcolm Maclaren and J. Allan Thomson 45. 

95. 187, 228, 

Gold production 48. 125. 235. 581. 591. 618. 835. 

Metallure'cal tendencies In W. A. MacLeod.... 

Mines returns 

Mining In 

Western Federation of Miners and Lead City miners' 
union building 

And ponular support Editorial. . . . 

W. B. Wilson s speech at Seattle Editorial. . . . 

Western Mining Co., Lake county. Colorado 

Westlnghouse company. Mlcarta 

Westlnghouse portable sub-station 

Wet crushing mill and efficiency 

Ground, sinking In Editorial.... 

Wettlaufer Lorraln mine. Cobalt" 

Dividends 

Wharton. H. E Home-made self-loading 

and dumping water skip 

Wh eel, dewaterlng. for pulo# 

White Caps property. Manhattan. Nevada 

Whitman. Alfred R Synthesis of pyrlte 

Wilkinson. Arthur, death of 

Willow Creek district. Alaska Editorial 

Lode mining in Sumner S. Smith. . . . 



311 
904 
117 
941 

854 
1022 
759 
557 

557 
617 
515 
1023 
1022 
1023 
599 
78 
305 
201 
311 
13 
548 
548 
591 
867 
987 
393 
50» 
826 
1031 
479 
158 

575 
876 
854 
290 
938 
693 



548 

589 



100 
694 
890 
892 
944 

1030 
209 
210 
272 
758 
191 
26 
944 

746 
135 
43 
517 
101K 



374 
951 
424 
911 
618 

826 
87« 
798 
117 
838 
1040 
<?3<i 
843 
iS* 
541 



461 

339 
825 
9"<! 
747 
330 
335 



Wilson mine, Plnegrove. Nevada **°98^( 

Wilson, Frank L Psychology of zinc! . . . 428 

Wlleon, J- ■ • • Gravel plant In Nevada 58 

Wilson. W. B., speech at Seattle Editorial.... 798 

Wilson Mines Co.. Missouri 196 830 

Wlnchell. Horace V Persistence of ore deposits 

in depth 33'* 

Wlnchell, Horace V., C. W. Goodale, M L. Requa 

Revision of United States Mining Laws 571 

Winona Copjpr Co. and Lovett grinder 372 

Company report 556 

Winona stamp-mill, Michigan, dewaterlng wheel for 

pulp 339 

Velocity cards 361 

Winter work in Alaska A. E. Garvey 110 

Ditto T. A. Rlckard 110 

Wireless telegraphy, Mexico Editorial 291 

Wisconsin, districts of 277 

Plattevllle field, shipments 469 

Zinc-lead district 67, 687. 782, 981 

Wltwatersrand gold Industry in 1912 

W. L. Honnold 182 

Hammer drills In 619 

W r ltwatersrand Gold Mining Co.. Ltd 619 

Ore crushing underground 856 

Wolf, J. H. G California oil production for 1913 579 

Wolfram and tin exports, Federated Malay States 636 

Tin-bismuth ores from Tasmania 461 

Wolverine Copper Mining Co.. Kearsarge, Michigan. . , . 

285, 636. 792, 992 

Wood. W. M Mining and milling at the 

Vulture property , 1018 

Work at Cucaracha slide. Panama 977 

Of the Oriental Consolidated mines 

Alf Welhaven 857 

Working costs at the Standard Consolidated 

- Edward H. Nutter 313. 

Workingmen's compensation Editorial.... 765 

Insurance, German 774 

Workmen's Compensation Act, British, results In 1912. 

Editorial 599 

Compensation law. Federal Editorial.... 920 

Compensation law. West Virginia Editorial.... 517 

Compensation problems H. W. Gartrell.... 105 

World banks, gold In 183 

Copper production 123. 260 

Wright. H. B...: Slime agitation 464 

Wyoming, metal production 404 

Mineral production in 1912 1035 



Yale, Charles G. and Hoyt S. Gale Borax produc- 
tion In 1912 .a 324 

Ditto Metal production. Oregon.... 480 

Ditto Mineral production of California.... 516 

Yampa Fuel & Iron Co.. coalfields in Colorado 

Editorial 85 

Yard -decision reversed Editorial.... 878 

Yeatman. Pope Braden Copper Co. ... 19 

Yellow Dog mine. Missouri 786 

Yellow J.ieket Mining Co.. Nevada 357 

Yellow journalism Editorial.... 214 

Yellow Pine mining district. Nevada 357 

Yosemlte Dredging & Mining Co.. California 1002 

Yuanml. Western Australia 235. 433, 594. 626. 835. 951 

Costs at 892 

Yuha Consolidated Gold Fields. California 740 

Yukon steamers, passengers carried 876 

Yukon Gold Co.. Alaska Ill, 116. 200, 321 

Company report 80 



Zeehun-Montana Mine. Ltd., company report 287 

Zinunermann, F Osmium-platinum, a new alloy.... 533 

Zinc and lead production, Missouri 814 

And tin ores, experiments in England and France... 818 

Box and hydrogen bubbles 708 

Butte & Superior mine 543 

Concentrator. Zinc Corporation. Ltd 104 

Franklin Furnace mines. New Jersey, production.... 154 

Industry, Butte 389 

Lead, and silver in the Coeur d'Alene. origin of — I. II 

Oscar H. Hershey 489. 529 

Lead district. Missouri-Kansas-Oklahoma 866. X026 

Lead district, Wisconsin 587, 981 

Metallurgy Editorial 920 

Metallurgy, limitations 865 

Mines. Spokane-Arizona Co 160 

Ore deposits In Boone and Marlon counties. Arkansas 

Kirby Thomas. . . . 854 
Ores and flotation processes at Broken Hill. Aus- 
tralia Editorial. . ■ . 175 

Ores, combined method of analysis for constituents 

of Frank A. Bird 18 

Ores, sources Editorial.... 42 

Production from domestic ore 323 

Production of Arizona 78 

Production . of Nevada 313 

Production. Utah In 1912 665 

Psychology of F. L. Clerc 63 

Ditto R. G. Hall. . . . 273 

Ditto Frank L. Wilson.... 428 

Smelter. Wyoming gasflelds proposed 824 

Smelting. Belgian furnaces In... George C. Stone.... 931 

Smelting in Australia 776 

Smelting Investigation. Canada Editorial.... 213 

Tailing, at Broken Hill, treatment of 26 

Trust and tariff commission Editorial.... 42 

Zinc Corporation, Ltd.. Bewick. Morelng & Co. . .26, 104. 381 

Company report 168 




.MININ<;'. 

RESS 



CIENTIFIC 



I S I All 1 I N II I II lfc60 



Whole No. 27b.? V ?K 7 


S VN FRANCISCO, SATURDAY, JULY 5, 1913 


limn: i ahs mt ANNUM 

SlnQle Copies, Ten CenU 


/KDEX TO AOVEPTISERS. PACE 41 


PROFESSIONAL DIRECTORY. PAGES 19-26 


BUYERS DIRECTORY , PACE 34 




UNIVERSAL 
PIPE LINES 
ABE THE 
ARTERIES OF 

INDUSTRY 



CENTRAL FOUNDRY" GQHBSNJT 

YORK 



2 



MINING AND SCIENTIFIC PRESS 



July 5. 1913 



STEAM ENGINES 



T 



When installing an Engine 
there are many points to be 
taken into consideration before 
an intelligent conclusion can be 
reached as to the kind and size best 
adapted to that particular place 

If skilled labor is not obtainable you 
need a simple, cheap engine 

If fuel is expensive a more complicated 
and more efficient engine will be suitable. 
These engines require intelligent, constant care 

Etc., Etc., Etc. 

We are in a position to quote you on 
exactly the engine most suitable to your work 

Let our engineers assist you in solv- 
ing your problems. They will look into 
the matter from your view point 




HARDINGE MILLS 

We Are Sales Agents for Colorado 
Wyoming. New Mexico and S. Dakota 



July 5, 1913 



MINING AND SCIENTIFIC PRESS 



DEISTER MACHINE COMPANY 

Home Office: Shoaff Bid?., Fort Wayne, lad. London Office: Salisbury House, London Wall 



Exclusively Control 




DEISTER SIMPLEX SLIMER 

l PAT ENTE C 1 



Deisters' Latest Improvements 



For the United States and All Parts of the World 

DEISTER SIMPLEX SLIMER, lor Slimes DEISTER SIMPLEX CONCENTRATOR, lor sands 

DEISTER MULTIPLE DECK TILTING SLIMER, lor finest slime over-flows DEISTER CONE BAFFLE CLASSIFIER, for coarse or fine materials 
Messrs. Emil & Wm. F. Deister being exclusively engaged with the Deister Machine Company. 



LIDGERWOOD 



S T EAM 

Up lo 1000 H. P. 



MINE HOISTS 



ELECTRIC 
Any Size 



A GOOD MINE IS WORTH A GOOD HOIST 




Lidgerwood 

Reputation 

Reputation is built upon 
performance. For more than 
forty years the reputation of 
the Lidgerwood Mfg. Co., for 
high-class hoists has been 
built up and maintained by 
the performance of the 
Company's products. 



One Type of Lidgerwood Friction Drum Electric Hoists 

LIDGERWOOD MFG. CO 



96 LIBERTY STREET 
NEW YORK, N. Y. 



SAM FRANCISCO 

M .NADNOCK BLDG. 



SEATTLE 

ALASKA BLDG. 



CHICAGO 

FISHER BLDG. 



4 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 





I 




tfs~ 



LI I I 1 1 1 I I 1 1-1 I 



am 



Goodrich Elevator Belts 





You need the best backing in the world 
for your mine or quarry elevator belt 

"V7DU get it in Goodrich Elevator Belts. Before adopt- 
ing the duck that is used, we developed for years the 
possibilities of the biggest duck mills in the country. This 
duck has exceptional tensile strength — nothing equal to 
it for elevator belt service. 



The friction is of the highest 
quality. Holds together the plies 
of duck throughout the hardest service 
— protects it against moisture or any 
foreign matter which may penetrate into 
the bolt holes. 



The cover of Goodrich Elevator 
Belts is tough, and wear-resisting 
— compounded with an experience bred 
of forty - three years. When made 
extra thick it protects the belt to a 
maximum. 



The B. F. Goodrich Company 

Factories : Akron, Ohio. Branches in all leading cities 



Makers of Goodrich Tires and Everything 
That's Best in Rubber 




There is nothing in Goodrich Advertising 
that isn't in Goodrich Goods 



July 5, 1913 



MINING AND SCIENTIFIC PRESS 



How About the 
"Heart Action" 
of Your Rock Drill? 

The valve is the "heart" of a rock drill. Every function of the drill, as a 
drill, depends upon the character of its valve. 

The valve determines the economy (or otherwise) of air or steam; the 
character of the blow ; the pull-back ; the speed of drilling ; the 
degree of cushioning; the regulation of stroke. In fact, the 
valve action makes, or mars, the operation of the drill. 

Consider the "Butterfly" valve. Note first of all its simplicity, as pictured 
here — two sturdy wings on a center body — all of toughest steel. 
Can you conceive of anything more simple — stronger — less liable 
to get out of order? 

The ports are not opened or closed by a sliding movement, but by a 
movement like laying a card on a drinking glass. Can you im- 
agine an arrangement with less opportunity for wear? 

The very slight "lift" of the valve from its seat gives an enormous port 
opening — actually larger than the area of the ports themselves. 
No chance here for ' wire drawing," or back pressure, or slow, 
sluggish movement. 

This "feather-weight" valve is moved by slight differences of pressure on 
two of its broad faces. And because it is so light, the movement 
of the valve is instantaneous ; while the impact on seating is so 
small as to be in no way injurious. 

The cushioning at ends of stroke is just enough for safety — not enough to 
retard the piston travel or diminish the force of the blow. 

Here you have an oil-toughened, heat-treated valve of tremendous 
strength working in a valve chest of Irco metal — stronger and 
tougher than cast steel. 

Because there is no wear to valve or seats — because the seating is com- 
plete and positive — there can be no leakage and waste of air 
or steam. 

When you have fully grasped the distinctive features of this "Butterfly" 
valve, you'll understand why the "Butterfly" Rock Drill, the 
"Jackhamer" and "Butterfly" Stopers and Plug Drills (all using 
the "Butterfly" valve) hit harder, drill faster, do more work per 
unit of power used, than any other drills you can buy.j - ^T-.lH 

And these are the very qualities you want in your drill — aren't they.? 




The "Butterfly" Valve 



New York INGERSOLL-RAND CO. 

Offices the World Over 

Compressors Rock Drills Stopers Core Drills 



KD-19 



6 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 



THE WEDGE MECHANICAL FURNACE 

PATENTED 




HIGH TEMPERATURES 

The above roasting furnace will stand high temperatures without 
encountering mechanical difficulties, and can be fired with oil, gas or 
coal, as desired. 

Notice the shaft is insulated with fire brick, and no air or water is 
required to cool the central shaft as is the case where cast iron shafts 
are used. 

Write us stating analysis of ore, concentrates, mixture or material 
you desire to rpast, characteristics and physical condition of same, 
number of tons to be treated per twenty-four hours, and results desired 
in the calcine. 



WEDGE MECHANICAL FURNACE COMPANY 

GREENWICH POINT, PHILADELPHIA, PA. 



,1 



uly 5, 1913 



MINING AND M IKNTIHC PRESS 



The Money Saving, Reliable 

KELLY FILTER PRESS 

— - PATENTED = 

In U. S. and Foreign Countries 

/Extraction ^ Operating Cost \ 
\ Capacity ^ Moistures / 
HIGH\ Efficiency ^ Maintenance /LOW 

/Pressure e Installation Cost\ 

\ Satisfaction d Water Consumption/ 

PATENTS ORIGINAL, VALID 
AND NON-INFRINGING 

In order to demonstrate the superiority of the Kelly Press 
we anxiously seek competitive tests at our new testing works. 
Send your ores to us for free filtration and capacity tests. 

WRITE FOR DESCRIPTIVE MATTER 

THE KELLY FILTER PRESS CO. 

210 Felt Bldg. Salt Lake City, Utah 



MINING AND SCIENTIFIC' PRESS 



July 5, 1913 



CONSIDER YOUR MILL COSTS 




The "Universal" has a capacity of 
50 to 100 tons per day, the tonnage 
being regulated by the size to which 
the material is screened. 



! 



CAPACITY 
EFFICIENCY 
ECONOMY 



Isbell UNIVERSAL Concentrator 



LOWER MILL COSTS 
SAVE 

MILL SPACE 

LABOR 

POWER 

WATER 

REPAIRS 



Consider the advantages of 
a table 

That requires no previous classification 
or sizing of the ore. 

That takes feed direct from 8 to 80 mesh 
screens. 

That saves mineral which will pass 200 
mesh, or finer. 

That produces clean concentrates and 
tailings, and not over 15% middlings. 

That does the work of four to six of the 
cross-water riffle type of tables, and that 
many additional vanners. 

Write for catalog • 



ISBELL MINING MACHINERY COMPANY 

1114 L. A. Investment Bldg. Los Angeles, Cal., U. S. A. 



July 5, 1913 



MINING AND SCIENTIFIC PRESS 



9 



THREADING NATIONAL PIPE 



Advantage* 

of Uniformity 



Good 

Thread* 

Ettential 

Constituents 
of a 

Proper Die 



Lip 

Chip Space 
Clearance 



(Uniformity of any material contributes l n . v to aucceiaful manipulation. For Instance: cross-cralned. 
Snarled or knotty wood cannot be properly enrv.-d. for It will split or rav«>| on a sharp mine. This Is analogous 
to steel or other metal. If metal Is not uniform. It may bo either too brittle or too soft In placos. and thus 
make a poor thread. 

(It will be conceded that the first requirement to mak«* the result of any proceaa successful Is good material, 
therefore to obtain a food thread the metal must be In the Mrst place uniform. Next, and equally Important, 
the tools must bo competent to do the work. 

fjA great deal of difficulty has been experienced In threading pipe, and It Is certain that the dies In use are 
frequently Inadequate In construction and Ineffectual In results. Practically all pipe must be threaded, there- 
fore dies which produce clean, smoothly cut threads will Interest every user of pipe. With the Improved form 
of dlo (see Fig. 1A). steel Is threaded (either by machinery or hand stocks), just as rapidly as Iron. 

fJA good die consists of a frame or holder ami a set of chasers, all arranged with consideration for the fol- 
lowing points. 

Lip — Chip Space — Clearance — Lead — Number of Chasers 

tin', aleo known ns hook or rake. Is the inclination of the cutting edge of the chaser to the surface of the 
pipe. Fig. 1A Illustrates the chaser of the properly made die. The chips curl oft* clean and leave a smooth 
thread. Fig. IB shows the chaser of an Improperly shaped die. 

CCHIP SPACE is the space required In the holder In front of the chaser to allow room for the accumulation 
of chips. A lack of chip space will cause the chips to clog and tear the threads. 

< CI.I-: \H \M'K Is the angle between the thn-nds of the chafers nn.l the tlueads of the pipe. 



Correct Form of Chaser 




Iiicorn'et Form of Chaser 





Fig. 1A— Thread Cut with Properly Made Die 



Fig, IB— Sam j with Improperly Shaped and Commonly Csed Die 



Lead 



Cha 



Results of 
Using 
Proper Die 



CLEAD Is the angle which is machined or ground on the front of each chaser to enable the die to start on the 
pipe, and also to distribute the work of making the first cut over a number of threads. 

CMJMBGR OP CHASERS. — To get good results at one cut, the die should have a suitable number of chasers; 
the approximate number is determined by the size of the die. 

CA die made with regard to these points by an experienced tool maker will thread both wrought iron and 
steel pipe with equally good results. Applying these principles to band dies. It Is possible for one man to do 
the work of two. 

CIn a paper by T. N. Thomson read before the American Society of Heating and Ventilating Engineers In 1906, 
the author says: 

"The power required to thread mild steel pipe with the new die Is not much more than that 
required to tbread wrought Iron with the same die, and much less than the power required to 
threail wrought Iron pipe with the common die." 

CThis subject is covered more fully In N. T. C. Bulletin No. 6, and we will be glad to send anyone who Is inter- 
ested a copy. 

MARKING 



<I To readily identify " NATIONAL" material, 
and as protection to manufacturer and consumer 
alike, the practice of National Tube Company 
is to roll in raised letters of good size on each 
few feet of every length of welded pipe the name 
"NATIONAL" (except on the smaller butt-weld 
sizes, on which this is not mechanically feasible). 

Name Rolled in Raised LetterB on National Tube Co. Pipe 



NATIONAL 



<f In addition, all'sizes of "NATIONAL" welded 
pipe below four or five inches are subjected to a 
roll-knobbling process known as "Spellorizing" 
to lessen the tendency to corrosion, especially in 
the form of pitting. This "Spellerlzing" process 
is peculiar to "NATIONAL" Pipe, to which pro- 
cuss National Tube Company hasexclusivo rights. 



f[ We have recently Issued n booklet, "MODERN WELDED PIPE," which trents of the 
■ manufacture, uses and characteristics of tubular products. While this book was not 
Issued for general distribution, we will gladly send a copy to any person whose letter- 
head or nctlvltles would Indicate a legitimate use. We will also send on request list No. 5, 
showing sizes, dimensions, trade customs and upeclticntlons. 



NATIONAL TUBE COMPANY, PITTSBURGH, PA., U.S.A. 

General Sales Office: FRICK BUILDING 

District Sales OMces:— Atlanta, Boston. Chicago. Denver. Kansas City. New Orleans. New York, Philadelphia', Pittsburgh. St. Louis. St. Paul, Salt Lake City 
Paclllc Coast Representatives :— U. S. Steel Products Co.. San Francisco, Portland. Seattle, Los Angeles 
Export Representatives:— U. S. Steel Products Co.. New York City 



10 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 



INDUSTRIAL LOCOMOTIVES 




When establishing designs for our standard light locomotives 
care was taken to secure efficiency and durability. 

They are proportioned so that the severest strains and shocks are 
met with proper resistance. 

No effort is spared in their construction. Every piece must be 
so accurately made as to fit not only the locomotive of which it 
is a part, but must fit every other locomotive of the same size 
and design. 

All parts are made in fixtures or to templates, compelling accu- 
racy of manufacture. They are made to go into place without 
a machine shop. 



AMERICAN LOCOMOTIVE COMPANY 

30 CHURCH STREET, NEW YORK 

McCormick Building, Chicago 
Dominion Express Building, Montreal, Canada 
Carl G. Borchert, Pioneer Building, St. Paul, Minn. 
A. Baldwin & Co., New Orleans, La. 
N. B. Livermore & Company, San Francisco and Los Angeles, California 
Northwestern Equipment Company, Seattle, Wash., and Portland, Oregon. 



July 5, 1913 



MINING AND m [I N I IMC I'KI » 



II 




All "Kmpl 



Empire" Gold Dredges 

Many of the superiorities of the "Empire" Gold Dredge are evident 
on even cursory examination, where superiorities of even 
more vital importance do not appear on the surface. 

Among these latter is the splendid design, which upon analysis 
reveals a scientific relation of specially constructed parts, 
rather than a mere commercial assembling of stock parts. 

Another is the quality of the materials used in the "Empire" Dredge 
— materials carefully selected or prepared from specifications 
of extreme exactness — all with a view to making the "Empire" 
the strongest, most durable dredge built. 

These external and internal features of superiority are combined in 
the "Empire" Gold Dredge in a high-grade, high-duty, gold- 
saving machine of utmost capacity, utmost endurance, and 
utmost economy, assuring the realization of maximum profits 
from any placer property that is "Empire" dredged. 



New York Engineering Co. 

2 Rector Street, New York 



"EMPIRE" PROSPECTING DRILLS 







1 














































An "Empire" 


Dredge in the Philippines 



12 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 



THE COPPER SMELTER 

Copper smelting is a complex process 

involving delicate chemical reactions under high 
temperatures. To insure the highest metallurgical and com- 
mercial results, the mechanical equipment should be of 
the best. 

No industrial operation requires greater 

assurance of continuity of service than copper 
smelting, none requires more substantial equipment, or more 
accessible and easily renewable parts; in no plant is faulty 
equipment so utterly useless. 

Long experience and intimate connection 

with the advances made in copper smelting in the 

past has given Allis- Chalmers 
equipment its well deserved 
reputation for reliability. 

Almost every smelter 

of note contains some 
Allis-Chalmers equipment: 
The sampling plant with its 
crushers, rolls, samplers, screens 
and accessories, the roasting 
plant with its McDougall fur- 
naces, the smelting plant with 

1.^ j I its special water jacket furnaces, 

"^^SHI t ' le converter plant w 'th the 
>^^-^Lj^|jPlKP^^tj best types of acid- and basic- 
■■mmukmm^sk^hbJ lined converters, the power 

plant with its steam, electric or 
gas actuated blowing engines and complete electrical equip- 
ment ; all designed and built for the special service required. 

Allis-Chalmers smelting equipment has 

produced more copper in the past than that of any 
other manufacturer; to-day it is the highest standard in con- 
struction and most economical in operation. 

If you desire first-class equipment free from operating difficulties write 

Allis - Chalmers Manufacturing Company 

Mining Machinery Department 

CHICAGO, ILL. 





For all Canadian Business refer to Canadian Allis-Chalmers, Limited, Toronto, Ont. 
For Arizona and Sonora we are sole manufacturers of and sales agents for the Hardinge Conical Ball and Pebble Mills. 



July :<. li'lH MINING AND Si II .NTIF1C PRESS 13 

LAP WELDED STEEL PIPE 




Large Diameter Lap Welded Pipe 

Sizes 12 to 72 inches. Thickness T /i to 1V4 inches. Lengths up to 40 feet. 
Coated with the highest grade Mineral Rubber Asphalt Coating. Each length subjected 
to Hydraulic Test 50% greater than specified working pressure. 

Specially Suited for HIGH PRESSURE WATER LINES, GAS, VACUUM 
AND CONDENSER WORK, DREDGING AND INTAKE MAINS 

Our Prices and Prompf Deliveries will interest you 
LAP WELDED PIPE CATALOG sent on request 

American Spiral Pipe Works 

CHICAGO, ILL., U. S. A. 

MANUFACTURERS OF 

SPIRAL RIVETED PIPE, LAP WELDED STEEL PIPE, FORGED STEEL PIPE 
FLANGES, EXHAUST STEAM AND HYDRAULIC SUPPLIES 



14 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 







GE 







Speed 
Efficiency 



1 



Safety 
Economy 




"Independence" Split Wood Pulley 
Born July 5, 18S2 



Meeting the Requirements of Unusual 
Conditions in Mining Service 

WHILE the "Independence" split wood pulley is primarily a standard stock article, 
manufactured for ordinary service, there is nothing whatever to prevent its being 
made to meet the requirements of unusual conditions in mining service. 

Some months ago we delivered a number of special split wood pulleys to the United 
States Reduction and Refining Company, Colorado Springs, Colo., for use on crushing rolls, 
the iron pulleys originally bought with the machines crystalizing from the vibration and jar 
on the rolls when large ore went through. The company's superintendent in writing us on 
the service of these pulleys said : 

" We do not believe that there is a better split wood pulley made than the Dodge 1 Independence' 1 
in meeting the requirements of extra hear-y duty." 

In the manufacture of special split wood pulleys no sacrifice whatever is made of the 
advantages of standard construction, nor is there any attempt made to improve upon the 
standard construction to meet the stresses of extra heavy demands. The rim always re- 
mains a structure of wood and glue, made as much thicker than the standard as the service 
may require. The arms and hubs are made up in the usual "Independence" way, with 
merely the necessary reinforcement and extra thickness called for by the large bore or 
other special matters. The arms are dove-tailed and wedged into the rim, as is customary, 
with standard anchor bolts. The hub and arm bolts which clamp the pulley halves to- 
gether onto the shaft are suitably increased in size and number. 

"Independence" pulleys for service such as that required by reduction and refining 
companies are special in proportions, yet absolutely standard in their conformity to the 
well-proved essential details of Dodge wood pulley construction. 

If you are looking for a pulley for heavy work it will be well for you to get in touch 
with us. We are quite sure that we can please you with our "Independence" brand. A 
snappy little book. "Prom Log to Line-Shaft." gives a history of the pulley and its use. 
Perhaps you'd like it. Nothing would please us better than to respond to your request. 



DODGE MANUFACTURING COMPANY 

"Everything for the Mechanical Transmission of Power" 

General Offices and Works: Mishawaka, Ind. 

Dodge Manufacturing 06., 14th and Lovojoy Sts.. Portland. Ore. Hendrie & Bolthoff Mfg. A Supply Co., Denver 

Harron, Rickard & McCone. Sim Francisco and Los Angeles Mine & Smelter Supply Co. Salt Lake City and El Paso 



July 5, una 



MINIM". AND >i II N I II K I'Kl S.s 



is 



Upwards of 10 Million Tons 

Gold and Silver Ores 

(based upon weight of Slimes dry) 

Treated Annually 

is the high testimonial of the 
efficiency of the 

MOORE PROCESS 

If you would save all the values reduced to 
solution and recover the solvent (both 
obtained at insignificant cost), the 

Moore Process 

GUARANTEES THESE RESULTS 



The Moore Filter Company 

New York 



16 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 



THE latest Improved No. 3 
"Deister" Slime Table is guar- 
anteed to make a better extrac- 
tion and be more generally efficient 
than either the Frue or suspended 
type of Vanner. A pleased customer 
remarks: "Your No. 3 table does as 
good work for us as vanners. at a 
tithe of the cost of repairs." 



The Deister Concentrator Co. 

Fort Wayne, Ind. 



BUDB 

Adamantine 

MARK 



CHROME STEEL SHOES AND DIES 

(Hydraulic Forded) 




These Shoes and Dies are hot-pressed under enormous pressure, in a Hydraulic 
Forging Press, which process insures a metal of absolutely equal density, and 
with the "Adamantine" standard of quality for toughness, the result is long 
service with even wear to the end. 

For Heavy-weight Stamps especially, "Adamantine" quality is most essential for 
economical milling. Our long experience in the manufacture of Shoes and Dies 
enables us to meet every demand of increase in both strength and quality for the 
heaviest Stamps. 

Mining and Metallurgical Engineers recognize the superiority of our "Adaman- 
tine" ChromeSteel Shoes, Dies, Cams, Tappets and Bossheads, and generally specify 
our steel for these wearing parts — -same being the accepted standard for quality. 

"ADAMANTINE" is our registered Trade Mark. To avoid substitution order 
by that name. 

' CHROME STEEL STAMP MILL PARTS is a booklet you should send for 
— it fully describes our products and contains lists of standard dimensions of 
Shoes and Dies we carry in stock, etc., etc. 

Write for it today. 



REPRESENTED BY 

George W. Myers, Kohl Building, 
Sao Francisco, Cal. 
J. P. Spellman, First National Bank Building, 
Denver, Colo. 



CHROME STEEL WORKS 

CHROME,, N. J.. U.S.A. 




NING and Scientific PRESS 




" Science has no enemy save the Ignorant.' 



Whole No. 2763 T» V t !V 



San Francisco, July 5, 1913 



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TABLE OF CONTENTS 



EDITORIAL: 



Page. 



Notes 

The Hall Sulphur Process 
Fourth of July 



ARTICLES: 

Building a Reduction Plant Herbert Lang 4 

Stoping Methods In Michigan Mines.. P. B. McDonald 9 

Imports of Potash Salts 12 

Equipment at the Crown Mines 13 

The Mineral Resources of Virginia — III 

Thomas Leonard "Watson 14 

Sulphur Industrv of Sicily 15 

St. Joseph Lead Co Dwight A. Jones 16 

Large Driving Belts 17 

Gold Production of West African Mines in May 17 

Combined Method of Analysis for Constituents of Zinc 

Ores Frank A. Bird 18 

Braden Copper Company Pope Yeatman If* 

Mineral Production of Peru In 1911 35 

Coal Mining in China and Japan 35 

Recent Metallurgical Patents on the Rand 36 

Barytes Production, 1912 36 

Chilean Sale of Nitrate Lands 36 

A New Mine-Rescue Telephone Equipment 39 

The Haldane Flame-Test Apparatus 40 

DISCUSSION: 

Minerals Separation v. De Bavay Process 

"Wilton Shellshear 21 
A Correction Hardlnge Conical Mill Company 21 

SPECIAL CORRESPONDENCE 22 

GENERAL MINING NEWS 27 

DEPARTMENTS: 

Schools and Societies 31 

Personal 31 

New York Metal Market Review 32 

Metal Markets 33 

Stock Markets 34 

Current Prices for Ores and Minerals 35 

Current Prices for Chemicals 35 

Decisions Relating to Mining 36 

Company Reports 37 

Concentrates 38 

Recent Publications 39 



EDITORIAL 



"CK)I.L<>\YI.\i; tin- articles mi the ' Organizat inn of 
A Smelting Enterprises' printed in April, we pub- 
lish this week one on 'Huilding a Reduction Plant,' 
liy Mr. Herbert Lang, who speaks from an experi- 
ence that lends much weight to his words. This 
will be followed in turn by some account of the pit- 
falls that have been met in actual construction by 
Mr. A. Sydney Additon, with especial reference to 
I he building of plants of moderate size in remote 
and difficult situations. 



T3KADEN Copper Company figures attract keen 
" interest in the United States where this great 
undertaking in Chile is considered the probable fore- 
runner of many profitable enterprises. We print 
this week the substance of a new report upon the 
property by Mr. Pope Yeatman, whose general ac- 
count of the deposit we published December 16, 
1911. Mr. Yeatman 's revised figures of ore reserves 
show 44,000,000 tons containing 2.65 per cent copper, 
as against a previous estimate of 23,000,000 tons at 
2.50 p"r cent. A broker's circular in New York says 
that this "shows the ease with which tonnage is 
added at the mine," which just raises the question 
whether Life is to have' a rival. 



A DVERTISING the results of company meetings 
is common in England, but is sufficiently un- 
usual in the United States to warrant calling atten- 
tion to the announcement of the Minerals Separa- 
tion American Syndicate, Limited, appearing in this 
issue. In these days when company success depends 
upon public support, expenditure for publicity is as 
legitimate as for raw materials. The danger to be 
guarded against is the placing of paid matter in the 
reading pages, the disguising of advertisements. 
That has been a common practice in the United 
States, though not, we are glad to say, one adopted 
by technical journals. The day for such misbrand- 
ing is rapidly passing. The great public service 
corporations find it better to take paid space and 
fill it with plain statements of fact, even in news- 
papers that editorially oppose their policies, than 
surreptitiously to own weak journals. The public is 
quick to detect and to discount tainted news. And a 
reputation for printing it kills the influence and 
therefore the income of a paper more swiftly than 
most violent, but evidently honest, partisanship. The 
advertising pages of a good technical journal afford 
a medium for reaching an especially thoughtful and 
influential audience, but to do so effectively the ad- 
vertiser must have a message of real import and 
must tell it plainly. To those who have such a 
message, we extend a welcome. 



2 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 



The Hall Sulphur Process 

Copper metallurgists everywhere, but especially 
in California, will be keenly interested in the Hall 
process for dealing with the sulphur in smelter fume, 
with which the First National Copper Company is 
about to undertake experiments upon a working 
scale at its smelter at Coram, California. Mr. Wil- 
liam A. Hall, who has devised the process, is a 
graduate of the Massachusetts Institute of Technol- 
ogy, and a chemist of distinction who has made 
notable successes in the field of industrial chem- 
istry, being a cousin of the chemist of the same 
name who devised the process for the production 
of aluminum by electrolysis of bauxite in a fused 
bath of cryolite. The Hall sulphur process is essen- 
tially a controlled oxidation; the sulphide ore being 
roasted in a specially-constructed furnace in an 
atmosphere of reducing gases and steam at a tem- 
perature between 700 and 900°C. As a result, the 
metallic bases are oxidized, but the sulphur, owing 
to the dissociation of the steam, escapes without 
becoming oxidized and, passing off in the fume in 
the form of 'flowers of sulphur,' is easily collected. 
Careful tests made under the direction of Messrs. 
C. F. Chandler and A. L. Walker, indicate that the 
chemistry of the new process is sound, Mr. Walker 
finding that ore containing nearly 40 per cent of 
sulphur was roasted to a sulphur content of 3 to 
5 per cent at a rate which indicates that approxi- 
mately the same tonnage per square foot of hearth 
area can be handled in this way as is done in cur- 
rent practice with the ordinary type of McDougall 
furnace. No data have been made public as to the 
fuel consumption to maintain this roasting speed, 
exact information as to th.is critical point being 
one of the objects of the large-scale experiments 
about to be started at Coram. The collection of 
the sulphur will be done by the aid of the Feld 
washer, though the possibilities of collection by 
means of the Cottrell electric precipitation process 
are also to be tested. The process will at first be 
applied to the McDougall roasters. 

The large question involved is. of course, the dis- 
posal of the sulphur to be produced. Application 
of the process to all the ore and operation at the 
rate maintained at Balaklala in 1910 will involve 
the production of about 250 tons of sulphur per 
day, or somewhat in excess of the present visible 
market, assuming that the sulphur can be laid down 
at points of consumption at a price which would 
enable it to supplant the pyrite now in use, as well 
as the rather limited amount of Japanese and Lou- 
isiana sulphur now being used in California. The 
estimated cost, of sulphur production is placed at 
$5 per ton at a maximum, at which rate 1he sul- 
phur would easily be able to dominate the market 
and perhaps increase consumption, as a lower sell- 
ing price commonly does. In any case, any finan- 
cial loss, not to exceed J /2 cent per pound of copper 
produced, for example, incurred in the production 
of sulphur may properly be charged to the cost 
of smelting under the conditions obtaining in Shasta 
county. Under previous conditions of operating at 
Balaklala, a production cost of 10 cents per pound 
of copper produced was estimated, though operat- 



ing difficulties caused it to be somewhat exceeded 
in practice. The new process, if it proves feasible, 
will meet fully legislative restrictions, and if 
the cost of operation proves sufficiently low, will 
solve the smelter-fume situation as far as the First 
National is concerned. It is proposed to spend con- 
siderable sums on the experimental work, under the 
direction of Mr. H. F. Wierum, who has had exten- 
sive experience with the Tennessee Copper Company, 
and the prospect of success seems decidedly favor- 
able. But, like the manufacture of sulphuric acid 
from smelter fume, the process is not one which is 
of universal application, as its general adoption 
would at once swamp the market on which depend- 
ence is placed for meeting the cost of operation. 
The foreign rights to the Hall patents have been 
acquired by the Sulphur Company, Ltd., and the 
American rights are controlled by the Federal Sul- 
phur Company, Ltd. We wish both companies the 
fullest measure of success in their efforts to meet 
a situation trying in the extreme to copper metal- 
lurgists throughout the world. 



Fourth of July 

Once more the 'Glorious Fourth' is with us, and 
from the great cities of the United States to the 
borderlands of civilization, bunting is being hung 
on the outer wall and the American people are 
joining in the celebration of the Nation's birthday. 
Other holidays may come and go, but the one red- 
letter day of the year, the one from which time is 
dated in the mining camps, is the Fourth of July. 
It stands out as the oasis in the summer months 
when the miner can forget for 24 hours the stopes 
and can devote his entire energies to celebrating. 
Probably in no other type of community is Inde- 
pendence day more thoroughly celebrated than in 
the mining camp. Here the festivities are as various 
as the changes of the kaleidoscope, and the miner 
gives himself up to recreation which ranges all the 
way from an over-indulgence in "the cup that clears 
today of past regrets and future fears," to general 
picnics with the accompanying liberal garnishing of 
patriotic sentiment by the camp spellbinder. The 
nipper and the general manager, united by the ties 
of patriotism, rub elbows in 'setting-off' fireworks, 
and on common ground decide questions of su- 
periority in matters of marksmanship and athletics. 
Outside of the possible barbecue, the features of the 
clay around which the greatest attention centres are 
the athletic games, which are planned to afford such 
a variety that everyone may participate regardless 
of their past performances on the athletic field or 
prowess in the recognized sports, for near-sports are 
given a prominent place in the order of the day, and 
the three-leg race and greased-pig events attract 
more attention than the 100-yard dash and the 
hurdles. Then there is the rope-climb, the shot-put, 
turkey shooting, and many another opportunity for 
each to shine. And always the band plays its 
sprightliest. 

The feature of the day's program, however, is the 
drilling contest, as it is this contest that carries with 
it, if not an olive wreath, at least a purse and a repu- 
tation. This is the one contest to which the mining 



July j, 11113 



MINIM. AND m U N I II K I'KI.SS 



3 



industry makes claim ss its own, ami the winning of 
the drilling contest is to the miner what the Mara- 
thon is to the runner, or the roping contest to the 
cowboy. No one knows how old the hand-drilling 
contest is. but every miner has watched with strained 
interest as the drill ate its way into granite while 
the umpire announces the passing minutes. We be- 
lieve the best record is that of the Amalgamated 
:<-hand team. 5iHo inches in 15 minutes, made at 
Calumet. Michigan, in It'll. How widespread is the 
interest in such contests is suggested by the picture 
below of a Fourth of July celebration at one of the 
Oriental Consolidated mines in Korea. While the 
dress of the onlookers is unusual, the rest of the 
scene is natural enough, even to the five-gallon 



there will be 'three baggers' and close decisions that 
will provoke hut emu , m ion. Whether the r.umtitu- 
lion follows the Hag is open to debate; but there is 
■ .) qucstiiin that el,,se I.. Inn.l 'Old « J 1 . » r v ' cmncs the 
l>aseba)l score. Wherever nino North Americans 
are gathered together there is a pitcher, a catcher, 
and a full complement of basemen and fielders. 
Japan's management of battleships was not more 
convincing of her Westernization than her enthusi- 
asm for baseball, and whether Stanford wins or loses 
at Tokyo today, sound friendships will be formed. 

It is always hard to leave a ball game, but we 
really must go to supper (never dinner at the mine), 
and besides there is the dance in the evening. If 
we are not ready and dressed in our best, who knows 




CELEBRATING THE FOURTH OF JULY IN KOREA. 



kerosene can converted into a water bucket. These 
Korean drillers, by the way, make good records, cut- 
ting their 30 inches and over in 15 minutes and con- 
testing as stoutly as any 'Peerless' man or 'Shad.' 
As hand-drilling is giving way^ to machine work, so 
are hand-drilling contests being displaced by com- 
petitions between machine drills. The first of these 
we believe was held on the Fourth of July 1902 at 
Idaho Springs, Colorado. The machine contests are 
longer but less dramatic. One misses the play of 
muscle and the display of brand new undershirts 
usually worn by contestants on such occasions. 

But we have lingered over-long perhaps at the 
drilling. There are still the hose-cart races to be 
run, the ladder-climbing contests, and the picnic din- 
ner. After that is the inevitable baseball game, 
between rival camps, where distances are not too 
great, and between mine and mill where geography 
must be considered. Today, we doubt not, from the 
Davis pyrites mine of Massachusetts, to Masbate 



but that Katie, the black-eyed waitress, may tire of 
delay and go on with Mike the 'mucker.' It will 
never do to be late. For those who do not dance, 
and even in a mining camp there are such, or per- 
haps as the sole attraction, there is that friendly 
glove contest between foundry and saw-mill. Seated 
expectant by the ringside there is a good evening's 
fun to be enjoyed, with many a pretty give and take. 
Always there is the half thought that a new 'white 
man's hope' may shine forth at the end. Tired and 
sleepy, we at last reluctantly go to bed, happily if 
with no head that hangs over on the morrow and 
makes food look repellant while the throat notes 
anew the dryness of the desert. The old custom of 
dedicating the Nation's birthday to drunkenness is 
gradually giving way to one of making it a day of 
healthy sport; and in the turning away from routine 
thoughts and work, we trust that each will find time 
for a quiet bit of thankfulness to our forefathers 
whose sacrifice made possible our Country. 



4 MINING AND SCIENTIFIC PRESS July 5, 1913 

Building a Reduction Plant 

By Herbert Lang 



When the plans and details of a proposed works 
are sufficiently advanced, the engineer sets about 
the preparation of drawings and specifications of 
the different articles required, with the view of ob- 
taining bids for supplying them. By far the greater 
number of such articles, being of ordinary manufac- 
ture, do not require to be designed, while their speci- 
fication may consist of the merest framework of 
words. Things of special manufacture, which should 
be as few as possible, require very exact drawings 
and specifications, and herein lies a great deal of 
work for the designer, all of which must be com- 
pleted before the plans are submitted to the build- 
ers. It is not well to ask bids from many firms. 
Scarcely ever is it advisable to call upon more than 
two or three, for reasons which will be more appar- 
ent to the experienced than to the casual reader. 
In such business undertakings as the erection of a 
large metallurgical works, it is policy to avoid pub- 
licity as far as possible. The engineer himself, 
whose drawings may represent the fruit, perhaps, 
of years of study, feeling that they mark a distinct 
advance in the art, has a natural wish to withhold 
them from the sight of manufacturers who, like many 
that might be named, make a practice of copying 
(in effect stealing) all original drawings that come 
to their shops. Again, there is much time lost when 
a large number of firms are taken into the competi- 
tion, owing to the number of explanations that are 
required to be given, and to other causes. 

Choice of Contractors 

It is common for the inexperienced individual or 
company to express a preference for the work of 
some particular builder, especially some much adver- 
tised concern with whose name they have become 
familiar, but of whose work they may know abso- 
lutely nothing. Not infrequently they may propose 
to put the whole matter of constructing the machin- 
ery, and even of setting up the plant, in the hands 
of some favorite iron works. This is a situation 
that calls for extreme tact on the part of the engi- 
neer, who may feel the impolicy of employing the 
firm in question, without being able to communicate 
his views to his own employers. The policy of cer- 
tain large builders in the United States is often 
quite unfavorable to the interests of engineers and 
employers alike. Their practice frequently is to sug- 
gest and bring about changes in the plans, to urge 
heavier and more costly machinery, to pooh-pooh 
the ideas and work of rival concerns, and finally to 
cast discredit on the original designer of the plant 
under consideration, provided that by injuring his 
standing with his employers they may advance their 
own interests. All this has its effect upon tyros, 
already awestricken by the fame of the bidding firm, 
and it not infrequently happens that the plans upon 
which the engineer spent anxious months are dis- 
carded, and the manufacturing concern is practically 
given carte blanche to construct the works. It can 



easily be seen that such proceedings are as little to 
the advantage of metallurgy at large as they are 
to the true interests of the machinery buyers. Aside 
from this, there is the natural and less reprehensible 
tendency on the part of all builders to increase the 
magnitude of the orders (and consequently their 
profits) at the expense of the purchaser, whom it 
is the duty of the engineer to protect. The firms 
most difficult to deal with are those which pose at 
once as builders of machinery and as original de- 
signers of plants. Such concerns produce only de- 
signs which embrace their own machinery as con- 
stituent parts, and as a rule will assume no responsi- 
bility as to the appropriateness of their designs, 
while at the same time they declare that they will 
not be responsible for the success even of their own 
machinery unless their designs also are accepted. 
This illogical stand cannot deceive the engineer, but 
appears sufficient to take in many of the more credu- 
lous sort of buyers, to the extent of giving a single 
order, never repeated, for machinery and plans. 

Making the Plans 

During the preparation of the plans and the con- 
struction of the works, there are times when it be- 
comes advisable for the engineer to call for outside 
assistance, especially in matters of mechanical engi- 
neering, in which he may not be sufficiently versed. 
At such times the resources in skill and apparatus, 
which well conducted and equipped iron works pos- 
sess, become of great use. "When such a course be- 
comes necessary, it is well to use great discrimina- 
tion in the selection of a suitable house. With some 
an application leads simply to the handing over of 
every detail of construction to people who are not 
in every way fitted for it. As a general thing, the 
large machinery houses are acquainted with only 
the mechanical engineering side of the questions, 
there being rarely any real metallurgical skill with- 
in the concern, and it often happens that the qual- 
ity of brains which such concerns place at their 
customers' disposal is of the most ordinary sort. It 
is far better to avoid such biased and incapable aid. 
The experience in this matter is that the smaller 
iron works, especially those making no pretense to 
extraordinary skill and ability in designing and 
building plants, are of far more assistance, chiefly 
because the problems are taken up by the principal 
officers of such works, who are apt to be men of 
high attainments in general engineering, and who, 
having no specialties of their own to uphold, have 
with more ability far less bias than the mediocre 
and prejudiced salesmen, draughtsmen, and what- 
not who perform that kind of task for the larger 
makers. No one but a metallurgist can ever know 
how the progress of the art has been hampered and 
delayed by the disposition of the larger makers to 
hang to their antiquated drawings and patterns; or 
by their employment of solicitors and clerks in the 
place of skilled engineers; or by their boundless 



July 5. 11113 



MINING AND SCIENTIFIC PRESb 



ft 



and absurd claims of improvement. Making the 
largest allowance for the oredulousness and gullibil- 
ity of the mining public, it ia difficult to under- 
stand how such clainiB can bring business. 

Purchase of Machinery 

Speaking generally, then, it would seem that the 
preferable way to proceed in the construction of 
the reduction plant would be, after the plans are 
advanced sufficiently, to ask tenders from two, or 
at most three, iron works of fair repute and of 
known skill and versatility, and select as the maker 
of the desired apparatus that one which combines 
the advantages of a low, but not too low, price 
with a location not so far from the proposed works 
that repair parts for the machinery cannot be had 
quickly. By no means should the successful bidder 
be required or even asked to erect the works, for 
this can always be done better and cheaper by the 
purchasers, with the added advantage that the men 
who are to run the plant can generally be had to 
set it up, whereby they become acquainted with its 
peculiarities, much to the betterment of the run- 
ning. Let the greater part of the machinery be 
bought in the open market, and let it be set up as 
soon as it arrives, without waiting for other parts. 
By no means put off the purchase of portions that 
are certain to be required, but arrange the arrival 
on the ground of the different portions so that 
there will be no rush at any 'time, but that a crew 
of a certain number of men, working steadily and 
without hurry, may perform the whole of the work. 
To 'rush things' is a favorite phrase with some 
builders, but rushing is expensive when metallur- 
gical works are to be set up. 

As a general thing, the time required for plan- 
ning and building the reduction works is much 
underrated. It frequently happens that companies 
who have pursued a leisurely course of mining de- 
velopment, occupying perhaps years in work that 
could have been performed in as many months, sud- 
denly resolve upon the erection of reduction works, 
and demand that they be built and put in operation 
hurriedly. The effect of haste in this work is in- 
variably bad. Not only do the plans suffer, but 
the mechanical work is poorer and the expense far 
greater. I repeat with emphasis the first rule of 
construction, which is, take plenty of time. To this 
the reader who has read and appreciated the fore- 
going will add for himself the second rule, namely, 
take plenty of money. 

Value of Guarantees 

The ordinary guarantees by makers of machinery 
relate to the quality of material and workmanship 
furnished, and are quite conventional in words and 
form. There is never any difficulty in enforcing 
agreements of this sort, and buyers may rest secure 
in the quality if not in the design of whatever they 
may buy in the way of metallurgical apparatus. In 
addition to materials, some of the larger machinery 
houses profess to furnish advice upon metallurgical 
topics, especially in cases where their apparatus is 
aboiit to be installed. This implies a responsibility 
not only as to the character of the machinery fur- 



nished, but also an to thy process or method of tri al 
ment to be adopted. Hence it may properly be 
nominated in the bond that the process and the ar- 
rangement of plant are to remain on trial until 
proved to be correct and advisable, and that before 
the dealers are paid for their wares. Otherwise 
their position, it is easy to see, is better than that 
of the professional engineer who prepares plans and 
gives advice for which he in the nature of things is 
held to strict accountability. If the machinery 
dealers were also held responsible for the advice 
they give, we should hear less unfounded boasting 
from them, and the condition of metallurgy would 
be much improved. 

Value of Professional Services 

The information upon which the engineer depends 
is furnished by maps, analyses, assays, and reports, 
but chiefly by personal inspection, of which nothing 
can take the place. No one, no matter what his 
qualifications may be, is justified in prescribing or 
planning without first having seen with his own eyes 
the ground of the future operations, and inspected 
thoroughly every part of it. This he owes both to 
himself and his employers. Nor can this inspection 
be slurred or hurried over. Time spent in such a 
careful reconnaissance bears excellent fruit in avoid- 
ance of mistakes, and in the improved character of 
the engineering. It is rare indeed that the engineer 
does not, with his trained vision, notice something, 
perhaps of great import, whose bearing on the prob- 
lems in hand had not been brought to the notice 
of the company. Such a fact, unexpectedly devel- 
oped, may result in an entire change of process; 
and whereas the company at first thought of putting 
in, let us say, a cyanidation plant, the light thrown 
upon the subject bx the investigations of the engi- 
neer may result in the decision to use chlorination 
instead. Again, the original resolve may have been 
to use a concentrating process, in which case the 
recognition, on the part of the engineer, of large 
amounts of accessible fluxing ores previously un- 
noted by the projectors, has turned the scales and 
rendered smelting vastly more feasible. 

Selection of Millsite 

One of the most important duties which can fall 
to the lot of the engineer is the selection of the 
site upon which the works are destined to be built, 
and into the choice of which go a great deal of the 
experience and skill which he should possess. Chi<;f 
among the considerations which govern the choice 
are those relating to the transportation of the ore 
from the mine to the works. The perpetual problem 
is how most cheaply to get the ore and other mate- 
rials to the works, and how to get the products 
away. As a rule, the question deals with the rela- 
tive merits of railways, overhead trams, and wagon- 
roads, according to circumstances. By no means can 
one solve these questions off-hand; but the engineer 
must prepare himself with such aids as contour 
maps, drawings, and estimates of cost, which em- 
brace facts that cannot otherwise be taken into ac- 
count. In order to know accurately the ground upon 
which he stands, the surveyor's aid must be in- 



6 



MINING AND SCIENTIFIC PRESS 



July 5. 1913 



voked, and a thoroughly reliable contour map made, 
embracing all the debatable ground. The 5-ft. con- 
tours should be used, and the scale must not be 
cramped. On this map proceed to lay out, first, the 
transportation lines, particularly if railways are to 
be a part of the plan, and next, the actual location 
of the works themselves. Notice that it is impor- 
tant to begin with the railway. Almost all such 
works nowadays are connected with them, and it 
needs no argument to prove the desirability of so 
arranging matters with reference to the different 
departments of the works that the handling of 
freight of all kinds will be facilitated to the utmost. 
This requires that the tracks be put down first. 
Herein may be noted the additional advantage that 
they may be used both in the erection and for the re- 
pair of the works themselves. In case that wagon- 
roads or overhead tramways be used for the means 
of transport, the necessity of their prior location is 
less obvious, but even then it will be found profita- 
ble to lay them out in advance of other construc- 
tions. 

Handling Material 

The ideal method of handling materials about the 
works is by means of railways of the standard gage 
of 4 ft. 8% in. By the exercise of skill and judg- 
ment on the part of the designer, all the require- 
ments of freighting may be met by lines of this 
sort, penetrating to all parts of the establishment, 
whatever be its extent, and delivering all the mate- 
rials wheresoever they may be required. A narrower 
gage may answer, but not if connecting lines are 
of the standard gage. Good engineering demands 
that such lines should be laid out with extreme care 
in order to obtain the utmost benefit. The sharp- 
est curve should not be of less than 200 ft. radius, 
and there should be no grades whatever within the 
works, while if such are deemed advisable on the 
outside, they must slope away from and not toward 
the works, thus preventing damage by runaway cars 
and engines. Metallurgists should take care to fol- 
low the practice of the railway engineers in all this, 
not only as to the construction of the line itself, 
but also as to the character of the rolling stock 
which may be intended for use. Given a broad-gage 
road, it would be quite inadvisable to introduce 
miniature cars or locomotives, because by so doing 
would be forfeited the numerous advantages that 
flow from full-sized apparatus. The extreme advan- 
tages of the full-sized railway equipment are not 
appreciated or understood except by the regular 
transportation companies, who, as is well known, 
are always seeking to increase the size and weight 
of their engines and cars, ffhis touches a principle 
that is universal throughout the whole domain of 
metallurgy. The superior economy of large furnaces, 
heavy stamps, powerful engines, and, generally, of 
the most powerful and heavy apparatus of all kinds, 
within the limits of practicability, are undeniable. 
What the extreme limits in size of practicable appa- 
ratus may ultimately be found to be is not material 
to the question. For the present the tendency is 
toward increased sizes of machinery in every branch 
of metallurgy. This tendency is accompanied by 



another not less strongly marked tendency toward 
increased speed of driving. Whereas, in times not 
remote, and within the memory of persons still in 
active practice, stamps, for instance, weighed 700 lb. 
and fell 80 times per minute ; they now have reached 
double the weight and drop 100 times per minute. 
Instances might easily be multiplied. The case of 
the reverberatory smelting furnaces, which have in- 
creased from 16 to 100 ft. in length of hearth, may 
be cited ; the iron furnaces of Pittsburgh, whose in 
lerual capacity is ten times what it once was; the 
matting furnaces of Butte, whose capacity has in- 
creased twentyfold in 20 years, are further illustra- 
tions. In all this the principle is the same ; that is 
to say, the economy of metallurgical devices de- 
pends, among other things, upon the size of those 
devices. 

The designer should take plenty of room. The 
works, however limited in capacity, should not be 
cramped. Compactness, upon which many builders 
pride themselves, is not a merit in metallurgical 
plans, but, on the contrary, is a chief cause of blun- 
dering. The likelihood of future enlargements must 
always be faced, and the question of fire insurance 
is generally a live one. It might be supposed that 
the matter of cheap and rapid transit through the 
works would be favored by compactness of plant ; 
but this is not always the case, inasmuch as it debars 
the engineer from the employment of the most rapid 
and economical means of transit when the different 
parts of the plant are huddled into a mass. Experi- 
ence shows that the separation of large or moderate- 
sized plants into departments has an excellent effect 
upon the success of the establishment as a whole, 
and should always be practised in laying out new 
works. All necessary study should be bestowed 
upon the plans while they are forming, there being 
no economy in hurrying this part of the work. The 
general drawings of the works should be finished 
and blueprinted before a single article is ordered, 
or a single shovelful of earth excavated. The site 
must be selected, and the location of all parts of 
the plant, including the corners of the buildings, 
staked out, if the fullest measure of economy in con- 
struction and running is to be achieved. It is well 
known that where these indispensable preliminaries 
are neglected the plant costs much more, especially 
in the two items of grading and excavating. 

Arrangement of the Plant 

Little is gained in general by extensive excavation, 
especially if it be in hard ground, since the improved 
methods of elevating and transporting render it in 
a measure unnecessary. The ideal metallurgical 
works should be so arranged that all parts may be 
accessible by the broad-gage railway line. This ne- 
cessitates laying out the plant alongside of the 
tracks, which must have been previously staked, with 
the longer axis of the buildings parallel to the 
rails, and not transverse, whereby the greatest cou- 
venience in the matter of dumping room is secured. 
The plant, if at all extensive or complicated, should 
be divided into departments or sections, so as to 
have good ventilation with freedom of each sec- 
tion from the smoke, gases, and flying particles 



Jul) 5, 1913 



MINING AND SCIENTIFIC PRESS 



7 



from the others. By thin disposition, the cost of 
buildings, and particularly of grading and of re- 
taining walls, may be much diminished. Where, on 
the contrary, the different parts of a plant arc hud- 
died together, not only is the cost of working greater, 
but that of subsequent additions to the works will 
also be greater. Further, tho very compactness of 
a plant, which is so much valued by some designers, 
will invariably prevent the orderly and logical ad 
ditions of parts that may be subsequently found nec- 
essary. 

Most metallurgical works are built upon side- 
hills in order to get the benefit of gravitation, by 
which the substances undergoing treatment are as- 
sisted on their way. The practice of so building the 
works has become fixed by the habit of generations 
and centuries, and with some builders has become 
almost second nature. But with the improvement 
in machinery, by which a wealth of appliances for 
hoisting, transferring, and lowering the heavy and 
bulky materials of metallurgy now available, 
the arguments and reasons that formerly led to 
the side-hill have in good part lost their force, and 
a rival school, advocates of the so-called leVel site, 
has appeared. Their arguments relate chiefly to 
smelting, but have an important bearing upon other 
metallurgical processes. 

Sidehill v. Single-Level Sites 

A sloping or side-hill site is made up virtually 
of a number of terraces, upon each of which some 
part of the plant is placed; there may be two, three, 
or more of these terraces, the result of excavation 
into the side-hill. The single level site, which osten- 
sibly is composed of but one level, virtually has 
quite as many, if by level is meant the elevation on 
which work is performed. For there must be, first, 
a lower dumping ground (called dump for short) 
on which the waste is deposited, and also several 
floors of greater or less extent, upon which the men 
stand to work at their tasks. Each of these floors 
may be entitled 'levels' with as much propriety as 
if they were the generally more extensive areas em- 
braced in the side-hill site. Thus there must be a 
space about the head as well as the base of cupola 
furnaces for their proper working; the use of ore- 
bins implies at least two levels ; and so for the usual 
arrangements of metallurgical works of all kinds. 
The conflict of opinion as regards one-level versus 
terraced sites was largely based upon a misappre- 
hension, and there is really not such a great differ- 
ence between the two opposed plans of construction 
as has been generally imagined. The greater differ- 
ences arise from the method of supporting the lev- 
els (floors) and their relative positions about the 
works. In the side-hill plan they are laid out in 
an orderly sequence from top to bottom ; while in 
the one-level plan they are scattered about the ter- 
race according to convenience or the views of the 
designer. In the former they rest upon the solid or 
filled ground ; in the other they are supported, for 
the most part, on framework of wood or metal. The 
question, therefore, is narrowed down to a consid- 
eration of the relative advantages of floors or lev- 
els supported by posts, or by earth or stonework. 



It ia necessary to consider the matter of installing 
and using the different classes of elevating anrl 
transferring machinery made advisable by the one 
or the other plan, together with the possibility of 
future enlargements and alterationa — a matter that 
should always be kept in mind. 

One-Level Site 

There is no question but that the one-level site, 
with buildings somewhat widely separated, is the 
most favorable to enlargements; and while the ques- 
tion of convenience and economy of working is to be 
settled by the engineer on the spot, I am firmly con- 
vinced of the superior advantages of the one-level 
plant in those respects also. Doubtless, most 
builders will agree that ventilation is better, and 
that as a general thing the danger from the spread 
of fire is less. As a rule, there is greater economy 
of space in the one-level plan, as the room directly 
beneath the upper floors is not wholly occupied by 
the supports, and because the stowage spaces can 
be better utilized. Ore, for example, which it would 
be out of the question to transfer for storage from 
one level to another, may be moved on the same level 
to wherever convenience may dictate. Thus any 
given space on the terrace may be used successively 
for several purposes, while on the side-hill plan the 
engineer is rigidly held to one use for one space. 

In the case of stamp-milling, where the course of 
the ore is constantly downward, and where there 
are no materials of any moment that require to 
be returned from lower to higher levels, there is 
little opportunity to argue against the side-hill con- 
struction. But in processes like cyanidation, where 
the ree'levation of the liquids forms an important 
part of the process, and which cannot be obviated, 
there is less reason for seeking a site upon slop- 
ing ground, as the pumping of the liquids from 
tank to tank cannot be much forwarded by differ- 
ences of levels between the tanks. 

Modern Iron and Steel Works 

In the larger iron and steel works, where the 
quautity of material to be handled reaches its maxi- 
mum, and the metallurgical engineering has ad- 
vanced to a perfect appreciation of the conditions, 
the works are invariably, of late years, placed on 
level ground, with abundant room for expansion 
and for the application of those approved means 
of transport that have attained such perfection 
in that work. There is no question there as to 
the proper site to be selected, other than as influ- 
enced by the favorable conjunction of lines of trans- 
portation, and the practicable nature of the founda- 
tions, which is vastly important to their ponderous 
apparatus. Thus at the Phoenixhutte in Germany, 
and the Lackawanna works in our own country, mil- 
lions were spent in the preparation of the unfortu- 
nately situated ground upon which the designers 
were seemingly forced to build. Fault may not 
be found with the selection of these sites, but it is 
unfortunately true that an undue amount of money 
is almost always put into such constructions as pil- 
ing, filling, grading, and draining unsuitable ground ; 
an expense which the merest change in transporta- 



s 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 



tion lines frequently renders wholly useless. If one- 
half the perspicuity that is devoted to the subject 
of metallurgical processes could be occasionally 
given to the study of railway or water transport, 
one-half the reduction plants would never be built 
where they are. 

Necessity of Several Levels 

Although the huge steel and iron plants of the 
day are regarded as the best exponents of the one- 
level plan of construction, the curious visitor will 
notice about them ample evidence of the universal- 
ity of the many-level idea. He will observe a strict 
adherence to the custom of erecting the big furnaces 
on a platform of masonry, elevated some eight or 
ten feet above the general level of the works, de- 
signed very properly as the railway level. This is 
in order to admit of the use of the large slag and 
metal pots and ladles, which often have a capacity 
of 20 or more tons, and being mounted on wheels, 
and drawn by a small locomotive, transport their 
contents wherever required. This mode of transport 
renders it a matter of small moment that the slag 
dump may be at a distance, often of several miles. 
But although the dump may be so far away, it must 
still be a dump ; that is to say, the slag must even- 
tually be brought to repose on a lower level than 
the tracks. Since work is performed upon the 
top of the masonry platform, that also constitutes 
another level. Again, the top of the furnace, being 
the scene of more or less labor, forms a fourth level ; 
and so on. In taking the pig iron to the bessemer 
vessels, a locomotive is sometimes used, which with 
its train of several ladles is hoisted bodily from the 
railway level to a position so elevated that the con- 
tents of the ladles may be poured directly into the 
converters. This, then, involves another level still. 
It can be seen after some reflection that the terrace 
or side-hill system of laying out these works would 
not answer in such instances. 

Concentrating Works 

In the case of concentrating works, I have always 
considered it doubtful if the advantages of gravity 
were not more than counterbalanced by the costs 
and inconveniences inherent in the form of con- 
struction which is now uniformly adopted. It would 
seem important to do away with the heavy and 
oftentimes costly retaining walls which this type 
usually requires; with the expensive and sometimes 
unsatisfactory wooden piers upon which rock-break- 
ers and other heavy machinery is generally sup- 
ported far above solid ground; and with the mas- 
sive buildings whose frames support the shafting 
by which power is transmitted to the various mech- 
anisms of such a works. Since the elevating and 
reelevating of the crushed material, often to con- 
siderable heights, is an unavoidable feature of this 
form of ore reduction, may it not prove to be the 
part of economy to extend the elevating system to 
such an extent as to allow the crushing apparatus, 
the shafting, and such other parts as require excep- 
tionally firm foundations, to rest upon the ground? 
Were this done, much money could be saved, par- 
ticularly in the cost of the buildings, which might 



be made much lighter, with large incidental reduc- 
tions in the danger from fire, the cost of insurance, 
and in replacements and repairs. 

The design and location of smelting works espe- 
cially have been much modified by the improve- 
ments in htisting and carrying machinery during 
recent years. Formerly, when the muscular strength 
of man was depended on for the transportation of 
the ore to the furnaces, and the removal of slag 
and metal, and when the daily tonnage treated did 
not make such a grand figure, it was almost a mat- 
ter of course that the work was arranged so that 
the slag dump was close to one side of the furnaces, 
while the ore dumps were as near to the other. 
The hauling of slag in two-wheeled hand pots is 
still practised in some works, even of comparatively 
modern build, while the wheeling of ore from the 
heaps to the feeding-floors is also common. The 
excursion of the hand-pushed slag-pot with its 300 
or 400 lb. of slag between furnace and slag dump 
is being replaced by the locomotive with its huge 
tipping basin of fifty or one hundred times that 
capacity ; or by the granulating stream, whose ca- 
pacity "has never been measured. 

Effects of Gravity 

The effects of gravity are many and indispensable 
in all metallurgical operations ; yet it is easy to 
go too far in soliciting its aid. Under an exaggerat- 
ed idea of its usefulness, designers have been known 
to seek sites on distant hills, and to lay railway 
tracks for many miles in order to obtain the advan- 
tages of a drop of some few feet. These advantages 
are measurable, if at all, in terms of the cost of 
elevating the same materials an equal distance by 
mechanical means. If the cost of doing this by 
such means commonly used be considered, an ap- 
proximate idea of what such a drop is worth in 
dollars and cents will be gained, and many would 
doubtless be surprised at its small value. The actual 
cost of the power for raising weights is but a trifle. 
The power of one horse, as is well known, is suffi- 
cient to raise 33,000 lb. one foot per minute, at 
which rate he could in 24 hours elevate the whole 
of the material consumed in a thousand-ton smelter 
a distance of 22 ft., which is not far from the aver- 
age height of a copper or lead blast-furnace. If an 
allowance of 50% be made for losses from the in- 
efficiency of elevating and hoisting machinery, and 
assume that the horse be replaced by electrical or 
steam power at an expense of $50 per year, the 
daily cost of the power for elevating the above 
amount works out to 28c. Other elements which 
enter into such an estimate, such as the cost of at- 
tendance, repairs, and in particular the loss by in- 
terruption of the work, modify it considerably, al- 
though the result will always show the impolicy of 
going far to secure the assumed advantages of grav- 
ity. Further, the engineer should not lose sight of 
the fact that some means are always necessary to 
raise the ore and other materials to the summit of 
whatever eminence is to be chosen, this possibly in- 
volving the use of an extended line of railway, 
whose use would not commonly be thought of as 
pertaining to the reduction plant and process. 



July 5. 1U13 



MINING AND SCIENTIFIC PRESS 



Stoping Methods in Michigan Mines 



By P. B. McDonald 



The choice of a mining method, for an undevel- 
oped property is a matter which should receive care- 
ful attention, as it involves a problem of primo im- 
portance in the economic working of the property. 
As the supply of cheap timber has decreased during 
the past 20 years, making the square-set method of 
mining expensive, a wide variety of new methods 
has been advanced, each particularly suited to cer- 
tain local conditions. The object of the new methods 
has been to do away with the use of so much timber 
and to make mining safer, thus reducing the loss of 
life. The notable increase in the mining of large. 



• The caving system is usually not suitable to a 
small or medium width orebody, but is a cheap 
mining method for a large massive deposit. At the 
Tobin iron mine of Corrigan, McKinney & Co. 
at Crystal Falls, Michigan, block caving is employed. 
A sub-level is opened 25 ft. above the main level, and 
a checkerboard of drifts and cross-cuts is driven on 
this sub-level, making a number of short vertical 
pillars in the ore, which are reduced to suitable size 
and then all blasted at once, thus undercutting a 
great block of ore 100 ft. high. As the ore slowly 
caves it racks and grinds itself into small pieces con- 




FlG. 1. BACK-STOPINO. 



Fig. 2. dbt-wall method. 



irregular shaped, low-grade orebodies has been a 
favorable factor for the development of new 
methods, mainly because an efficient mining method 
is a necessity in the mining of low-grade ore. In 
most of the recent methods, shoveling of ore in the 
stopes is avoided as much as possible, on account of 
the high cost of this work. There are several mines 
paying dividends today that were failures before a 
system of mining was evolved which suited the local 
conditions at each property. 

Classification of Mining Methods 

Mining methods are usually classified as to 
whether the stoping is overhand or underhand or a 
combination of the two, but there is a better classi- 
fication having to do with the condition of the stope 
itself. The stope may be open, as in relatively nar- 
row veins of hard ore, with very little or no timber 
used in the process; the stope may be kept filled 
with broken ore or waste rock on which the miners 
stand to drill ; or the caving principle may be em- 
ployed in which a block of ore is undercut and part 
of it removed, the balance being allowed to settle 
due to the force of gravity. 



venient for loading into tram cars and is subse- 
quently discharged through chute-raises to the main 
haulage level and trammed to the shaft. The ore at 
this property is a medium hard, red hematite. 

Pewabic Mine 

In the Pewabic mine at Iron mountain no sub- 
level is driven, but blocks of ore 250 by 200 by 100 
ft. high are caved into the main level where pillars 
8 ft. square have been shot out. The block of ore is 
first undercut along the foot-wall and one end. 
When the pillars have been withdrawn the ore 
gradually settles to the floor, and in spite of the fact 
that it is rather hard ore, it is crushed so that 80% 
of it can be put through a 3-in. opening. This cav- 
ing process takes from 6 to 8 months. Timbered 
drifts and cross-cuts are then driven through the 
crushed ore, and the trammers shovel the ore into 
ears, beginning at the more remote headings, and 
pull down the timber sets as they retreat. The cost 
of mining by this method at the Pewabic is about 
50c. per ton. It will be noted that the cost of ex- 
plosives and timber are naturally low. It need 
scarcely be stated that caving methods of mining 



10 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 



render the overlying surface unfit for buildings, 
railroads, and the like. 

On the Mesabi range in Minnesota caving meth- 
ods suitable to soft ores are extensively used for 
mining large flat lenses of iron ore. On the Mesabi, 
and in some parts of Michigan, caving is accom- 
plished in sub-levels by drawing horizontal slices 
8 to 20 ft. high and extracting these successively 
from the top downward. The overlying rock or sand 
caves and is kept separated from the ore by a mat 
of timber and lagging; this overlying material fur- 
nishes weight which helps cave the few feet of ore 
over the 'room,' which is 8 ft. high, and is excavated 
by the miners underneath the block to be caved. 
Caving in horizontal slices by means of timbered 
sub-levels is a more careful method than the block- 
caving methods used at the Tobin and Pewabic. but 
is also more expensive in labor and timber and is 
better fitted for a high-grade ore. It is necessary to 




shovel practically all of the broken ore, and nearly 
all the drifts and 'rooms' have to be carefully tim- 
bered. The 'caving' is not caused by removing the 
pillars, but by widening the timbered room 8 ft. 
high and caving the few feet of ore overhead. In 
some cases the slices are only 8 ft. thick altogether, 
so that practically none of the ore is caved. The 
term caving applies principally to the overlying 
rock and sand. 

Back Stoping 

Fig. 1 illustrates back stoping. By this method 
the stope is kept nearly full of broken ore upon 
which the miners stand when drilling into the back. 
The broken ore is removed by trammers on the haul- 
age level by prying apart the cross-lagging over 
their heads and letting the o*re drop into the tram 
cars. The cross-lagging rests upon timbers laid 
lengthwise of the drift, which in turn are supported 
by heavy timbers placed at intervals across the drift 
with their ends securely recessed in the walls. The 
miners climb to the back through ladder-ways or 
raises which are left at intervals. The level of the 
broken ore may be kept on a slope lengthwise of the 
orebody so that flat stope holes may be drilled and 
the ore broken in benches ; or the broken ore may be 
kept horizontal and 'uppers' drilled into the back. 



The levels are usually 100 ft. apart; when the stope 
is within about 20 ft. of the level above, the un- 
broken material is left as a floor pillar as long as it 
is desired to maintain the level above, after which 
this floor pillar is drawn retracting toward the shaft. 
This methojj of mining is especially suitable for a 
steeply dipping vein from 8 to 12 ft. wide. It has 
been successfully used in the hard ore mines of the 
Michigan iron regions. Some operators object to 
mining on broken ore, because of the capital repre- 
sented in the large amount of broken ore which is 
necessary for keeping the stopes filled. 

Dry- Wall Method 

Fig. 2 shows the main features of the 'dry- wall' 
method used in some of the South Range copper 
mines of Michigan where the dip is sufficiently steep. 
The main haulage drift is driven lengthwise of the 
lode and is widened out to the full width of the ore- 



body, perhaps 20 ft., by ' breast-stoping. ' The broken 
material is carefully sorted and the waste rock is 
built into 'dry-walls' (so called because no mortar 
is used) on each side of the track, perhaps 8 ft. 
apart. The miners are very skillful at building 
these dry-falls, and the finished walls, which are 
7 ft. high, are surprisingly straight and solid. The 
balance of the waste-rock is thrown behind the 
dry-walls. Heavy timbers are now laid across the 
drift, the ends resting on top of the dry-walls; 
these timbers are spaced at about 2-ft. intervals and 
planks or timber are laid on them lengthwise of the 
drift, thus making a tight roof to the haulage way. 
Overhand stoping is now started, the miners stand- 
ing on this platform and using it as a floor. As the 
stoping progresses, the broken material is sorted and 
the waste rock is kept to stand on, while the ore is 
thrown down chutes to the haulage levels. The 
chutes are built in the waste rock by the dry-wall 
method of stone laying, and are about 65 ft. from 
centre to centre. If there is not enough waste rock 
to make sufficient fill to stand on, a raise is driven 
to the level above or to the surface, and broken fill- 
ing is run into the stope until the men can stand on 
the waste and reach the back for drilling. The top 
of the fill is usually kept level and small cars may 
be used on it for handling the 'ore. If it is desired 



First level 




Fig. 3. open-stope method. 



July j. 11»13 



MINING AND SCIENTIFIC PRESS 



11 



to use horizontal holes to break llt«' on\ a portion 
of the till may ho kept at an angle of about 40°, 
upon which the miners can stand ami drill and thus 
break the ore in benches; otherwise 'uppers' arc 
used. Thus method of mining is obviously suited 
for ore that requires considerable sorting, and gives 
better results than going to the expense of hoisting 
all the broken material to the surface before sort- 
ing it. Native copper rock is easy to sort, especially 
when the surfaces are fresh, as is the case immedi- 
ately after blasting. This method of mining is also 



mining methods, the tloor pillar can be drawn, re- 
treating toward the shaft, when desired. Workings 
left for a long time arc apt to got dangerous. This 
method of mining is suitable to mines where a small 
daily tonnage is hoisted and where it is desired to 
obviate dead work and tying up capital. Where the 
ore is variable and pockety, this method is especially 
suitable, as the poor material can be readily left as 
pillars in the mine. Some mines leave 40% of the 
vein material unbroken because of its poor showing; 
incidentally these pillars tend to make the workings 




Fig. 4. sub-level stoping method. 



safe, because the miners can watch the roof over their 
heads and see in advance any signs of caving. The 
cost of mining is usually over $1 per ton, but this 
refers of course to the sorted product which is the 
result of careful underground sorting, and should 
not be directly compared to a method which hoists 
both ore and waste before sorting. 

Open-Stope Method 

Fig. 3 shows an open stope method of mining 
which is used in various parts of the country with 
orebodies up to 30 ft. in width. This method is sim- 
ple, makes little 'dead' work and permits ore being 
stoped almost as soon as the shaft is sunk. It has 
the disadvantage of a high roof over the trammers' 
heads, which is dangerous in mining soft ores. The 
shaft may be sunk in the ore following the dip of 
the vein (as in sketch), or it may be a few feet back 
in the foot-wall and maintain a constant dip. Levels 
are usually 50 ft. apart measured along the dip. 
The drifts are kept small near the shaft, but, after 
leaving a suitable shaft pillar, a stope is opened 
about 30 ft. high. When the system is well started, 
driving along the vein takes place near the roof of 
the stope in what is called the 'heading,' this drift 
being later widened to the full width of the orebody. 
Stope holes are put in on the slope leading from the 
haulage level up to the heading; both down-holes 
and 'lifters' can be used, and when blasted they 
break the ore in large masses and chunks that may 
need sledging to handle conveniently. The roof is 
kept well trimmed or 'scaled, '-ladders being used to 
occasionally inspect the older workings. As in other 



safer. The cost of mining by this method is usually 
less than $1 per ton. 

Sub-Level Methods 

Fig. 4 shows the comparatively new sub-level 
stoping method in use in many of the smaller Michi- 
gan iron mines with ore of medium hardness ill 
steeply pitching, tabular orebodies up to 100 ft. in 
width. A vertical shaft is sunk in the foot-wall and 
a cross-cut is driven on each 100-ft. level to the ore, 
where a main haulage drift is driven in each direc- 
tion, lengthwise of the deposit. If the orebody is 
wide, two parallel haulage drifts are sometimes 
driven and connected at intervals, making a con- 
venient track system for motor haulage. Chute 
raises are then driven 25 ft. above the floor and 
spaced 25 ft. centre to centre, being put in the cross- 
cuts if necessary. Main haulage levels are usually 
100 ft. apart ; and three sub-levels are driven, spaced 
about 25 ft. from floor to floor. The first sub-level 
(consisting usually of a single drift) intercepts the 
tops of the chute-raises. The sub-level drifts are 
hastily driven and do not resemble the carefully 
trimmed haulage drifts. Stoping is started on the 
first sub-level by putting in down-holes around the 
end chute-raise for blasting out a funnel shaped top, 
'uppers' being blasted next. The right-hand portion 
of the first level shown in Fig. 4 illustrates the start- 
ing of a stope, and below on the second level is 
shown an earlier stage of development with sub- 
levels partly driven. The second level on the left- 
hand side shows a stope well started, while above on 
the first level the stope is well advanced and the 



12 



MINING AND SCIENTIFIC PRESS July 5, 1913 



floor pillar is being mined and is falling into the 
second-level chute-raises (thus connecting the first- 
level stope with the second-level stope). As the 
sub-levels are drawn back toward the shaft or to- 
ward the ladderway, both 'down* and 'upper' holes 
are used, as well as horizontal holes for widening to 
the walls. The walls should be firm so as not to cave 
and mix with the broken ore. The miners take care 
to keep the bottom sub-level back under the middle 
sub, and the middle sub-level farther back than the 
upper sub-level so they are protected by the un- 
broken ore over their heads from falls of ground in 
the stopes. The open stopes are of course dangerous 
places to enter, and no one is allowed in them. The 
sub-level stoping method of mining is notably a safe 
one, as the miners attack the ore in the stopes taken 
from the sub-levels where they are practically as 
safe as in the main haulage ways. The chute-raises 
are equipped on the haulage levels with ordinary 
wooden lip chutes for loading tram cars ; by raising 
the planks from the mouth of a chute the ore runs 
out, but occasionally blocks itself from some large 
chunk becoming wedged, in which case a stick of 
dynamite may be necessary to loosen the ore. 

Mining Wide Orebodies 

When the orebody is wider, the mining of the 
ore in the sub-levels is accomplished by maintain- 
ing a bench to the wall on each side which gives the 
miners a place to stand ; the middle portion of the 
ore (where the sub-level drift is) is kept drawn back 
ahead of the sides, giving a semi-circular effect to 
the edge of the stope. In some cases where the sub- 
levels are rather far apart vertically, all the ore be- 
tween cannot be reached either by the uppers from 
below or by one set of down holes from above ; it 
is then necessary to climb down from the upper sub- 
level to the bench remaining, when the first set of 
down holes was blasted, and drill another set of 
down holes.. Should the ore be too soft to permit 
this bench to hold a man and a rock-drill, it would 
be necessary to space the subs nearer together and 
have more of them. The expense of driving the 
sub-levels is one of the disadvantages of the method. 
Where the orebody is long, it is customary to make 
the stopes about 250 ft. in length, separating them 
by ladder-ways protected by vertical pillars. It will 
be noted that this method of mining is an open stope 
method, in that the stopes are not filled with broken 
ore, waste, or caved material. The method has been 
adopted by mines that in the old days would prob- 
ably have used the square-set timber method, and 
is sometimes preferred to the method of back stoping 
on broken ore. 

The four methods of miniifg just described are ap- 
plicable to steeply dipping orebodies. When the 
vein has a shallow dip, say 20 to 40°, it is usually 
much easier to devise a cheap mining method, be- 
cause the miners can then stand on the foot-wall as 
they work up from one level to the next. It is pos- 
sible to drive the main haulage drifts to the property 
boundaries and commence stoping in a retreating 
system, holding the hanging wall by pillars or tim- 
bers so long as mining is in progress on that level. 
The Wolverine copper mine in Michigan has had a 



notably low mining cost, partly because of the shal- 
low dip of the lode, which makes mining compara- 
tively simple. In early days in the Lake Superior 
district miners tried to hold up the hanging wall 
indefinitely by timber stulls, which was impossible 
below verv shallow depths. In some of the older 
stopes of the Calumet & Hecla mines, timbers once 
10 or 15 ft. high can be seen which have been crushed 
down to 2 or 3 ft. by the slowly sinking hanging wall. 
It has been recognized that, since the hanging wall 
cannot be held up, it is better to devise methods 
which allow the hanging wall to come down, timber 
being used only for local purposes to prevent falls of 
ground. 

Imports of Potash Salts 

The importation of potash salts for consumption 
in the United States during 1912 amounted to 622.- 
179.164 lb., valued at $10,692,285, according to W. 
C. Phalen, of the U. S. Geological Survey. This 
importation is only a part, however, of the potash 
salts entering the United States. To it should be 
added the importation of kainite and manure salts, 
including double manure salts. The imports of pot- 
ash salts of these classes amounted to nearly 700,000 
long tons, valued at more than $4,000,000. The im- 
ports for consumption of materials entering largely 
into the fertilizing industry, plus the domestic phos- 
phate rock, reached the total valuation of over 
$46,000,000. These statistics in detail, together with 
others showing the condition of the German potash 
and salt industry, are given in the Survey's report 
on potash just issued as an advance chapter of 
the volume 'Mineral Resources of the United States 
for 1912.' 

The investigations of the Geological Survey in 
1912 into sources of potash salts in the United States 
included a continuation of deep drilling in Nevada, 
begun in 1911 ; a continuation of the collection of 
samples of rock-salt brines and bitterns, and of 
the study of the salt industry of the United States: 
the examination of various dried or partly dried 
lakes, playas, flats, or marshes in several of the 
Western states, both within and without the Great 
Basin, including Arizona, California, Nevada, New 
Mexico, and Nebraska ; the investigation of deposits 
of potassium nitrate in California and Montana; 
and the investigation of occurrences of alunite in 
Arizona, Colorado, and Nevada. Information on 
all these investigations has either been published 
or is in process of publication by the Survey. 

Mr. Phalen 's report contains abstracts of papers 
on sources of potash published by the Bureau of 
Soils aud by private individuals during 1912, as well 
as sections on potash salts as a by-product in the 
manufacture of portland cement, and on the util- 
ization of kelp at Cardiff and Terminal Island, Cali- 
fornia. 



Anthracite production of Pennsylvania in 1912 
totaled 75,322,855 tons, valued at $177,622,626, 
against 80,771,488 tons, and $174,952,415 in 1911. 
There were 174,030 men employed, who worked an 
average of 231 days during the past year. 



July 5, 1913 



MINING AND m U N I II R PRIAS 



18 



Equipment at the Crown Mines 

•The paper on 'Centralized Organization at the 
Crown .Mini's.' which was read by K. ('. Warriner. 
the general manager, before a recent meeting of 
the South African Association of Engineers, is the 
most complete that has ever been prepared to de- 
scribe and illustrate the main features of the ore- 
handling operations of a mine upon the Rand. The 
following extracts are of special interest. 

Sorting and Crushing Station 

At No. 5 shaft the ore is delivered from the skips 
to. the grizzlies at the head-frame which consist of 
two sets; the upper set is spaced 3% in. and 8 in. 
apart, and lies at an angle of 22". This upper set 
was put in, firstly to take the shock of the falling 
rock from the 'fines' grizzly, and secondly to re- 
tard the flow and so obtain better grading. The 
second set or 'fines' grizzly is spaced 2 in. apart, and 
lies at an angle of 45°. The grizzlies are placed im- 
mediately above the 'fines' bin, and the 'fines' ac- 
cumulated in this bin are loaded direct into the 50- 
ton hopper trucks for transport to the mills. The 
oversize from both sets of grizzlies is delivered into 
a coarse-rock bin, whence it is fed to the sorting 
belts. The ore is washed as it is fed to the sorting 
belts in a chute fitted with sprays, and having a 
bottom fitted with grizzlies of fire-bar section to re- 
move the coarse particles, slime, and water. The 
washing water for these sprays is delivered from a 
5-in. Enke high-lift centrifugal pump, which is sup- 
plied from the mine pump column. The washing 
water is run by launder to a revolving separating 
screen which removes all particles over ^-in. size. 
It then runs to an 8-in. Robeson-Davidson sand pump, 
which delivers it to a conical separator at 'C mill, 
the overflow going direct to the slime-collecting 
tanks and the underflow to tailing pumps, and then 
to tube-mills. The oversize from the separating 
screen is delivered into a small concrete bin from 
which it is raised periodically by means of a small 
air winch and skip, and tipped into the 'fines' bin at 
the head-frame. By this method clean water is used 
for washing, the labor usually employed for cleaning 
settling sumps is saved, and other difficulties com- 
mon to this portion of a sorting station are over- 
come. 

Sorting Belts 

The sorting belts, four in number, are 36 in. 
wide, have an inclination of 14°, and are run at 
a speed of 150 ft. per minute. Each belt is driven 
by a 25-hp. motor, running at 500 r.p.m. through 
a 60-to-l reduction gear, fixed between the head pul- 
ley of the sorting belt and the pulley driven from 
the motor. To this pulley is attached a 'Benn' fric- 
tion clutch running in oil, and by this means the 
belts are stopped and started at will. This system 
is to provide for the thorough sorting of each por- 
tion of the belt. For example, a belt loaded with 
rock from the bin is run out and stopped. It is then 
the duty of each boy to pick the belt clean of waste 
immediately in front of him. As soon as the over- 

* Abstract from South African Mining Journal. 



Kcor in charge is satisfied that ull the waste hnn 
U-eu removed, he plaoea a chalk mark at the bottom 
end of the belt, which is thou act in motion and 
stopped again when the above-mentioned chalk mark 
ia opposite the foremost aorting-hoy. The waste 
sorted is placed on the under aido of the belt and 
is delivered into a waste-rock bin of large capacity. 
One boy ia employed on each waste-rock belt sort- 
ing out any 'reef which may have been accidentally 
discarded. The waste is loaded from the bin into 
20-cu. ft. side-tipping cars, and these cars are ele- 
vated to the level of the top of the waste dump by 
a creeper chain-gear, the capacity of which is 6 tons 
per minute. This chain ascends an incline of 20° at 
a speed of 60 ft. per minute. The system has proved 
most satisfactory, a considerable saving of labor be- 
ing effected when compared with other types of ele- 
vators, and this is the first plant at which it has 
been installed on these fields. At the head of the 
creeper chain-gear, the cars are attached to a me- 
chanical haulage which conveys them to the dump- 
ing point. 

Tube-Mill Pebbles 

During the sorting operations, tube-mill peb- 
bles are also picked and deposited on a conveyor 
belt running diagonally across and under the 
sorting-floor in such a manner that the pebbles can 
be picked from either of the four sorting belts. The 
pebble conveyor delivers into a partitioned-off por- 
tion of the main bin under the crushers, from which 
the pebbles are loaded into the 50-ton hopper-shaped 
cars for transport to the tube-mill pebble bins at the 
various mills. The sorted ore is delivered at the 
upper end of the sorting belts into a distribution 
box or bin, which feeds three 12 by 30-in. Hadfield 
& Jack reciprocating jaw crushers, for reduction to 
V/z-in. diameter. The crushed ore falls directly into 
the main ore-bin and is loaded from there by pneu- 
matically operated doors into the 50-ton hopper 
trucks. The whole of the plant is electrically driven 
by separate motors for each piece of machinery, the 
crusher motors being 60 hp. each. The crusher sta- 
tion and bins are built of ferro-concrete, and the 
sorting station of steel. The plant was laid out for 
a crushing capacity of 6000 tons in 10 hours, but 
for individual hours the output has been as high as 
750 tons. The following table showing units of 
power consumed and cost of same for crashing and 
sorting should prove of interest: 



- Crushing. . 

h3 d O 



- Sorting. 



B 



Month. 



^ o 



E - 



October ....105,836 26,195 0.25 0.13 13,500 0.13 0.07 

November ..101,896 35,431 0.35 0.18 17,500 0.17 0.09 

December ..109,430 29,444 0.27 0.14 23,500 0.22 0.12 

January ....135,940 27,675 0.20 0.11 29,500 0.22 0.12 

Between 400 and 500 miles of 6, 8, and 10-in. 
pipe is being made by the National Tube Co., of 
Pittsburgh, for oilfields in Rumania, Europe. 



14 MINING AND SCIENTIFIC PRESS July 5. 1913 

The Mineral Resources of Virginia — III 

By Thomas Leonard Watson 



Virginia has more known deposits of manganese 
and has produced more manganese than any other 
state in the Union. Manganese ores occur in each 
of the three major geologic provinces of the state, 
namely, the Coastal Plain, the Piedmont province, 
and the Appalachian Mountains province. Of these, 
the Mountain province has yielded the principal 
production, -with extensive operations and a large 
total production from the Piedmont province. Only 
a small production has come from the eastern or 
Coastal Plain province. The beginning of mangan- 
ese mining in Virginia and perhaps in the United 
States was in 1857, when 100 tons of ore was report- 
ed taken from the lands of Joshua Robertson about 
five miles from Waynesboro, Augusta county. The 
principal productive manganese deposits in the state 
are: (1) those of the Piedmont region occurring 
chiefly in Campbell and Nelson counties, south and 
northeast of Lynchburg; and (2) those of the Val- 
ley region occurring along the west slope of the 
Blue Ridge. 

Only the oxides of manganese are of commercial 
importance in Virginia. Of these, pyrolusite and 
psilomelame greatly predominate with, in places, 
much of the earthy oxide, wad. These oxides often 
occur admixed in varying proportions. The ore is 
often partly or entirely crystalline, of a dark steel- 
blue color, and the nodular (kidney) type, which 
usually prevails, often displays a complete or partly 
layered structure. 

Ores of Manganese 

The manganese ores are usually found imbedded 
in the residual clays which overlie the rocks, from 
which the clays have been derived by the usual 
processes of decay. The underlying rock yielding 
the ore-bearing clays may be of sedimentary or 
igneous origin. The ore is distributed in clays in an 
irregular manner in the form of pockets or lenticu- 
lar masses, rarely as distinct beds; as veinlets and 
stringers cutting the clays in all directions; as sin- 
gle nodules and masses, ranging in weight up to 
500 pounds, assembled in the clays; as small dis- 
seminated grains scattered through the clays; as 
breccia ore in large masses ; and as probable replace- 
ment and cavity fillings in sandstone or sandy clay. 
In places, both in the Piedmont and Valley regions, 
the ore distribution conforms in a general way tc 
the bedding of the inclosing clays; frequently, how- 
ever, this is obscured and the orebodies indiscrimi- 
nately cut the clays in all directions. 

The nature of the manganese ores mined in Vir- 
ginia is one of irregular distribution, in the form 
of nodules and pockets, through residual clays, 
which range in thickness from a few feet up to 
several hundred feet. The method of mining de- 
pends largely upon the situation of the deposits and 
their depth below the surface. Open-pit and under- 
ground methods are both employed. These methods 
are often used to advantage in combination. Un- 



derground ^timbering is necessary on account of 
the liability of caving of the clays. 

Tin 

Though not a producer of tin, the existence of 
tin ore in Virginia, in the Irish creek area of Rock- 
bridge county, has been known for many years, 
and in 1883 and later the deposits were opened in 
several places. The Irish creek area is about four 
miles long in a northeast-southwest direction, and 
three miles wide. The tin ore (cassiterite) occurs 
principally in greisen veins, which traverse the gran- 
ite in all directions and have steep though varying 
dips. The Irish creek tin area was carefully exam- 
ined in 1885 by the late Jed. Hotchkiss, who con- 
cluded his report on the area as follows : "In con- 
clusion, this report is emphasized by the opinion 
that this Irish creek tin-bearing district, as above 
described, will prove abundantly productive in tin." 

Nickel and Cobalt 

The existence of nickel in Virginia has been re- 
ported, from a number of localities in the Piedmont 
region, especially in association with extensive pyr- 
rhotite bodies of the Floyd-Carroll-Grayson counties 
plateau in southwest Virginia, and in Amherst coun- 
ty east of Lynchburg. More recently nickel has 
been reported from near Broad Run station in Fau- 
quier county. In addition to the above occurrences, 
cobalt is found in association with some of the im- 
pure earthy manganese, deposits of the Valley re- 
gion, especially along the western base of the Blue 
Ridge. Probably the most encouraging locality 
from which nickel has been reported is in the north- 
ern part of Floyd county, where the Virginia Nickel 
Corporation has done considerable exploratory work 
on Flat Run and Lick Fork. The ore is chiefly pyr- 
rhotite, with some ehalcopyrite. 

The rocks immediately associated with the ore 
are, without exception, of igneous origin, and com- 
prise pyroxene syenite, diabase, and gabbro. These 
are intruded into the country schists and gneisses. 
The gabbro and diabase penetrate the pyroxene 
syenite in dike-like forms and are accordingly 
younger in age. The mica-gabbro is the ore-bearing 
rock. In some parts of the gabbro, the sulphides 
are sparingly present, in others they make up 50% 
and more of the total rock mass, with all grada- 
tions between. 

Arsenic 

In 1903 the United States Arsenic Mines Co., of 
Pittsburgh, Pennsylvania, began the mining of ar- 
senopyrite (mispickel) at Rewald, in Floyd county. 
An extensive plant, erected for refining the product, 
was started in 1901. with a monthly capacity, after 
January 1905. of 90 tons of pure white arsenic. 
Operations were temporarily abandoned several years 
ago, but were resumed in 1911. 

The mines are 17 miles from Christiansburg, at 
Rewald, Floyd county. The ore is arsenopyrite, a 



July 5. 1913 



MINING AND SC IENTIFIC PRESS 



i:> 



double sulphidu of arsenic ami irou, anil occurs in 
'veins' (lenses) in quartx-soricitc schist, which is 
closely associated with hiotite gneiss, but the rela- 
tions of the two rock types to each other, and of 
the gneiss to the orebodies, are unknown. The prin- 
cipal ore body is reported to be 3 ft. thick at the 
surface and widens to a thickness of 14 ft. at a 
depth of 120. 

Rntilo (Titunium) 

The Virginia rutile deposits are only known rutile 
deposits of commercial importance in the United 
States. Rutile is mined in the Tye River-Hat Creek 
area of Nelson county. The area is a large one, situ- 
ated in the foothills region of the Blue Ridge, and 
is about seven miles northwest of the main line of 
the Southern Railway. Recent detailed field stud- 
ies of this area by the Virginia Geological Survey 
indicate practically an unlimited supply of rutile 
which can be concentrated to yield a high-grade 
product, much of it containing more than 99% of 
Ti0 2 . Since 1902 the Virginia deposits have sup- 
plied all the rutile used in this country, and much 
of the product has been shipped abroad. With the 
development of new uses of titanium — the two 
most important being in the manufacture of ferro- 
titanium for the production of special grades of 
steel, and in the manufacture of arc-lamp electrodes 
— and the consequent increasing demands for rutile, 
the prospect for the future of rutile mining in Vir- 
ginia seems decidedly encouraging. 

Two distinct types of rutile occur in the district, 
and each has been mined. In the first type, desig- 
nated syenite (formerly pegmatite) rutile, the rutile 
occurs as disseminated grains of various sizes and 
as wavy lines in a coarse-grained feldspar-quartz- 
hornblende rook. In the second type, designated 
nelsonite rutile, the rutile occurs in an even-granular 
rock, having dikelike characters, and composed nor- 
mally of ilmenite and apatite. The American Ru- 
tile Co. began mining the syenite (pegmatite) rutile 
in 1001 on the east side of Tye river near Roseland, 
and in 1902 a milling plant was built for concen- 
trating the ore. In 1907 the General Electric Co. 
exploited the nelsonile dikes, near Rose's Mill, .for 
rutile. 

A second area of rutile has recently been discov- 
ered in Goochland and Hanover counties, Virginia. 
The area is an encouraging one, and some prospect- 
ing work has been done near Peers in Goochland 
county, and near Waldeloek and Gouldin in Han- 
over county. The rutile is found as an original 
constituent in acid pegmatite dikes which penetrate 
gneisses derived from granites by metamorphism. 
Masses of nearly pure metal weighing many pounds 
are found in places on the surface admixed with 
the residual rock decay produced by the processes 
of weathering. ' 

Mica and Minor Minerals 

Pegmatites containing commercial mica have been 
abundantly developed in many parts of the Virginia 
Piedmont counties, and many excellent surface in- 
dications occur. Up to the present time, however, 
prospecting and the mining of mica has been con- 
fined to only a few of the known deposits. Dikes 



of pegmutite continuing feldspar as an important 
i "list it unit are quit, widely distributed throughout 
the Virginia Piedmont region. Feldspar, with the 
associated mica of the pegmatites, has been mined 
in a number of counties. In the years previous to 
1907. Virginia was a producer of asbestos, but since 
that time the mines have been inactive, although 
the mineral is known to occur in several counties. 
The mill for fiberizing the asbestos at Bedford City 
lias been closed since 1906. The gypsum deposits 
occur associated with the salt deposits of Washing- 
ton and Smythc counties, in the valley of the North 
Fork and llolston rivers. The date of the discovery 
of gypsum in Virginia was probably in the early 
part of the nineteenth century. The mines of the 
United States Gypsum Co. and the Southern Gyp- 
sum Co., which are situated northeast of Saltville, 
are the most extensive and the only producing ones 
at present. 

Salt mining has been an important industry for 
a number of years. In 1771, Jefferson mentioned 
in his 'Notes on Virginia' the occurrence of salt 
brine in the Holston valley, but it was not until 
1840 that rock salt was discovered. A large number 
of wells have been bored, ranging in depth from 
300 to 1400 ft., the greatest depth being 2380 ft. 
At the present time there are about 24 producing 
wells. The mining of rock salt has not as yet been 
attempted, the entire salt product being derived 
from the salt brines of the wells. Of recent years 
the brines have been utilized exclusively for the 
manufacture of sodium carbonate and caustic soda. 
The product has been of superior merit from the 
start, and because of this fact a large and growing 
trade has been acquired. 

Virginia is entitled to take rank among the chief 
coal-producing states. Many of the reserves have 
been made accessible recently through the construc- 
tion of new lines of railroads'. The area of the 
southwest Virginia coalfield is estimated to be 1550 
square miles, with the original supply of coal placed 
at 22,500,000,000 tons, of which total but a small 
percentage has been mined to date. 



Sulphur Industry of Sicily 

There was nothing noteworthy in the trade of 
the year 1912, differences in exchange rates except- 
ed, prices remained practically stationary. Ship- 
ments to Greece and Turkey showed a decline be- 
cause of the Balkan and Italo-Turkish wars. 

The total exports of crude and refined sulphur 
from the island of Sicily in 1912 amounted to 447,- 
590 metric tons, which was a slight decline from 
1911. The chief purchasers of Sicilian sulphur were 
as follows : Prance, 104,109 tons; Italy, 77,396 tons : 
Austria, 38,359 tons ; Norway and Sweden, 34,850 
tons; Germany, 32,286 tons; Russia, 25,562 tons: 
England and Malta, 19,833 tons; Australia, 11,285 
tons; and United States and Canada, 2894 tons. 
Prices averaged, refined, $20.94 per ton; refined- 
ground, $23.16 ; refined-rolled, $21.80 ; and sublimed, 
$26.63 per ton. The production was 357,547 metric 
tons : and stocks at the end of 1912 were 450,917 
tons. — Consular Report. 



MINING AND SCIENTIFIC PRESS 



July 5. 1913 



St. Joseph Lead Company 

By Dwioht A. Jokes 



•The production of lead from the smelter during 
the past year has been 66,847 tons. Of this amount, 
32,109 tons was from purchased ores, 31,296 tons was 
produced from our own mines, and 3442 tons was 
from stock at Herculaneum. The average price re- 
ceived for lead at East St. Louis was 4.35, or approx- 
imately $87 per ton, there being some increase in 
the average price for the year. The net income from 
all sources, after the payment of all expenses and 
income charges, and after setting aside $75,626 for 
depreciation, was $637,910.37 in comparison with 
$598,082.52 in 1912. Dividends amounting to $597,- 
300 were paid during the year, being 6% on the out- 
standing capital stock. 

Influence of Industrial Situation 

In order that the stockholders may appreciate the 
situation that has existed with reference to the work 
and earnings of the Company during the last few 
years, it is desirable to recall the great change in 
the general industrial situation which occurred dur- 
ing and after the year 1907, as the lead industry 
was seriously affected by this change. In 1906 the 
net income was $1,256,545.68, and in 1907 it was 
$2,038,820.32. For the year 1906 the price of lead 
at East St. Louis was over $100 per ton, and for 
the year 1907 it was over $114 per ton. In the fol- 
lowing year, 1908, the price dropped to $88, and 
the net income fell to $657,446.89. While the Com- 
pany had, during the years preceding 1908, taken 
many steps to increase its output and to improve 
its plants, which for the most part were built many 
years previous, it was suddenly confronted with a 
situation that demanded drastic action in all its 
widely separated departments. 

As the most essential and most beneficial posses- 
sion it could have was a strong and adequate lead 
reserve, much time had been devoted and much 
money had been expended in drilling adjacent lands, 
so that all the deposits that were available at low 
cost could be secured and so that other companies 
would not crowd upon its territory. In doing this 
it was realized that only a portion of the work 
had been accomplished which was necessary for 
broad development into a thoroughly equipped min- 
ing concern with a modern power-plant, modern 
mills, and a modern smelter. A new mill, then equal 
to the capacity of any mill in the district, had been 
built in a new territory and was first in complete 
operation in the year that ended on April 30, 1905. 
Notwithstanding the improvements in the mining 
plants which had been made, it was realized each 
year, with the continuance of the low price of lead 
that has prevailed since 1908, that mining must be 
done on a large scale to make the work profitable 
under new conditions, and must be confined to as 

•From report as president for the year that ended on 
April 30, 1913. Details regarding the difficulties of this 
company were given In the Mining and Scientific Press, 
November 9, 1912, and March 24, 1913. At the latter time 
a summary of the balance-sheet for the year was printed. 



few mines as practicable, and that mills to be profit- 
able in the ASstrict must also be capable of handling 
a very large tonnage with a minimum of loss, and 
that modern smelting plants must be equipped with 
every known method of saving lead to accomplish 
work economically and efficiently. On these ac- 
counts, it has been necessary for the Company to 
discard old power-plants, old mill methods and 
equipment, old roasting, smelting, and refining fur- 
naces, and as rapidly as large mines could be found, 
to abandon mining from scattered shafts, which had 
been the necessary practice for many years. 

Improvements 

During this period also various improvements in 
mining, milling, and smelting have been introduced, 
and even some of the later methods have been dis- 
placed by newly patented processes, especially in 
the smelting department, where this Company was 
the first in any country to use a large-size Dwight- 
Lloyd sintering plant. These considerations are 
brought to the attention of stockholders that they 
may understand the conditions that have prevailed 
since 1908 and may appreciate the necessity for a 
considerable expenditure of money. It has been 
the aim and desire to furnish all needed improve- 
ments as soon as plans could be perfected for such 
improvements. This policy has been necessary, and 
the ample and newly discovered ore reserves made 
this policy wise and practicable. The pig lead prod- 
uct from mines owned by the Company in the year 
that ended on April 30, 1900, was 12,196 tons, and 
in 1912 was 34.195 tons. The pig lead product from 
the Company's smelter in 1900 was 19,270 tons, and 
in 1912 was 62,922 tons'. The net income in 1900 
was $231,294.60, and after reaching its highest point 
in 1907, was in 1913 $637,910.37, owing mainly to 
the reduced price of lead. Since 1899 the Leadwood 
district, now the main mineral reserve district, was 
acquired ; the Hoffman, Hunt, Day, Eaton, Angel, 
and Prospect Lead Co. tracts, containing 1631 acres 
of mineral land, having been purchased from the 
owners. The new mill at Leadwood and the three 
shafts supplying it with ore, and the power-plant 
and other accessory plants, have been entirely con- 
structed. Other valuable tracts of land in the Bonne 
Terre district have also been acquired, and, by pros- 
pect drilling, large and valuable ore deposits have 
been disclosed. 

Financial Standing 

On April 30, 1900, the Company owed $292,319.99, 
after deducting its cash and bills receivable. In 
the period from this date until April 30, 1913, the 
Company expended approximately $4,400,000 in 
construction essential for its increasing product and 
operations, and it has written off for depreciation 
on property and plant over $2,500,000. No fixed 
amortization charge has been adopted because the 
value of the mines has been constantly increased 
by drilling, and it was not deemed advisable to 



July 5, 11)13 



MINING AND SCIENTIFIC PRESS 



II 



take up this subject until a reasonable approxima- 
tion to their full value could be made. Summariz- 
ing the entire indebtedness of the companies, it 
appears that the St. Joseph Lead Co. owes, less 
cash, notes, and accounts receivable, $1,982,307, that 
the Mississippi River & Bonne Terro railway owes, 
less cash, notes, and accounts receivable, including 
its indebtedness on its equipment notes, approxi- 
mately $800,000, and that the Bonne Terre Fanning 
& Cattle Co. owes practically nothing except its 
indebtedness of $244,450 to the St. Joseph Lead Co. 
It is, therefore, seen that the three companies, with 
assets conservatively valued at approximately $19.- 
000,000, less cash, notes, and accounts receivable, 
have a total indebtedness of $3,000,000. 

Additions to the Property 

The total amount paid for lands bought by the 
St. Joseph Lead Co. since 1899 has been approxi- 
mately $300,000. After extensive prospect drilling 
on properties acquired, large and valuable deposits 
were found. In the years 1902 and 1906 the values 
of the Hoffman and Hunt mines were increased on 
the books of the Company $5,500,000. That these 
mines are even now far more valuable, recent drill- 
ing has fully proved. Moreover, since 1904, lead 
of a gross value of over $15,000,000 has been taken 
from the property. Additional exploration has 
greatly extended the territory in the neighborhood 
of these mines. 

In the entire period since its organization, the 
net income of the Company has been $15,247,022, 
while its total cash dividends have been $8,717,486. 
Many important improvements are yet under way. 
and it may be desirable for the Company to mak<; 
still further extensions to its plant, but when the 
improvements now in process of completion are fin- 
ished, there is likely to be a great addition to the 
net income, and before undertaking further expend- 
itures it is deemed desirable to go over the whole 
situation with respect to the ore reserves and plants. 
The savings to be effected in the immediate future 
include those resulting from the larger stopes in 
the mines, the abandonment of old steam-plants, 
and the introduction of Hancock jigs and other 
modern mill machinery at Bonne Terre, and also 
from the mine, mill, and power improvements at 
Leadwood. It is also expected that from the many 
new and systematic methods and the recently erected 
large flue at Herculaneum and the new bag-house 
now in course of construction, material savings will 
be effected in the smelting department. 

During the years since 1908 the price of lead re- 
cieved by the Company at East St. Louis has been 
for fiscal years as follows : 1909, $81 per ton ; 1910, 
$85 ; 1911* $84 ; 1912, $83 ; and 1913, $87 per ton. 

Future Outlook 

A normal increase in the consumption of lead has 
taken place from year to year, and the great activ- 
ity in electrical work, both in Europe and this coun- 
try, indicates that the price will advance. During 
September 1912 lead in London and in New York 
sold at practically $100 per ton, but has unfortu- 
nately receded for a time. In view of these consid- 
erations and of the work that has been accomplished 



in securing lead reserves, and in rebuilding and ic- 
orgnuir.ing the plants and mining operations, it is 
I'i'lieved that thr stockholders will in the future 
tind much cause for satisfaction. Such improve- 
ments as have been made on the surface lands of 
the company have resulted in causing an increase 
in the value of other real estate held by it. 

Doe Run Lead Co. 

The ore output of the Doe Run Lead Co. for April 
1913 was over 4200 tons of lead concentrate, valued 
at approximately $179,000. The business of the St. 
Joseph Lead Co. as a lead producer and refiner, and 
as the owner of an industrial railroad necessary for 
its own purpose, is njuch more valuable with the 
large ore and concentrate product of the Doe Run 
Lead Co. to handle, than without it. It is of great 
importance that this business should be retained 
and that the alliance with the Doe Run Lead Co. 
should be continued in some shape. The smelting 
contract between the St. Joseph Lead Co. and the 
Doe Run Lead Co. was approved by the board of 
directors of the St. Joseph Lead Co., and is a fair 
contract. In Missouri it has been criticized as un- 
fair to the Doe Run Lead Co., while in New York 
it is criticized as unfair to the St. Joseph Lead Co. 
The contract was made for a period of SYz years, 
of which period one year has already expired. It 
provides that the concentrates of the Doe Run Lead 
Co. shall be purchased at the market price, with a 
fixed charge of $6 for smelting and a deduction of 
10% for loss. It also contains a provision that an 
average price for the year of not less than 4c. shall 
be paid for the lead in the concentrate. The aver- 
age price of lead has not been below 4c. at East 
St. Louis for over 12 years. The contract contains 
a provision allowing for the alteration of its terms. 

If a consolidation of the St. Joseph Lead Co. and 
the Doe Run Lead Co. could be effected, there is 
no doubt but that a substantial reduction of ex- 
penses could be made, and that more freedom could 
be obtained in carrying on the joint operations of 
the companies. It is, therefore, to be hoped that 
such a consolidation can be brought about. 

Large Driving Belts 

Two large driving belts were recently made in 
San Francisco by the H. N. Cook Belting Co. for 
the American Beet Sugar Co., at Oxnard, Ventura 
county, California. Their dimensions are (1) 76 in. 
wide, 4 ply, by 105 ft. long; and (2) 65 in. wide, 3 
ply, and 157 ft. long. The hides of about 1000 
steers were used in their manufacture. 

Gold Production of West African Mines 
in May 

Tons. Value. Profit. 

Ashanti 11,018 $177,000 $58,000 

Broomassie 3,214 73,400 36,900 

Tarquah 4,910 67,200 12,400 

Abosso 8,870 76,800 17,300 

Sorting belts in the Coeur d'Alene region are pro- 
tected from wear by cross-bars of flat steel riveted 
to them; at the Federal mines these turn up at the 
ends, giving the effect of a trough. 



18 MINING AND SCIENTIFIC PRESS July 5. 1913 

Combined Method of Analysis for Constituents of Zinc Ores 

By Frank A. Bird 



Decompose 5 gni. of the ore in a No. 1 beaker and 
cover with water. If the ore is a light sulphide or 
oxide, add 10 c.c. of nitric acid and potassium chlo- 
rate at short intervals to oxidize the sulphur, if 
necessary. If the ore is a heavy sulphide, use from 
15 to 20 c.c. of nitric acid and sufficient potassium 
chlorate, or a saturated solution of potassium chlo- 
rate in nitric acid. The decomposition is effected 
as in any of the wet sulphur methods. A moderate 
heat will generally decompose the ore and prevent 
the formation of sulphur globules. Should sulphur 
separate out, transfer it to a No. beaker and 
decompose it with a little nitric acid and chlorate, 
then add this to the main portion, which will save 
time. When all of the sulphur is in solution, evap- 
orate the solution to a pasty condition and add 5 
c.c. of water and 7 c.c. of hydrochloric acid, and 
reduce to dryness to expel the nitric acid and de- 
hydrate the silica. Cool the residue and add 5 c.c. 
hydrochloric acid, heat to solution, and everything 
should then be decomposed. Add 20 c.c. cold water, 
35 c.c. ammonia solution, 1 and a precipitant for 
manganese; 10 c.c. or more of hydrogen peroxide 
or bromine water. (Or ammonium persulphate salt, 
0.1 to 0.5 gm. when the sulphur is not determined.) 
Boil 5 min. and filter into a No. 2 beaker, using 
a 9-cm. ashless paper. Label this 'Precipitate A.' 

Lime. — Wash the beaker and paper alternately 
three times each, with hot water; reserve the beaker 
and place it under a funnel. Should the filtrate not 
smell strongly of ammonia, add a little more am- 
monia. Place solution on a hot-plate, and when 
boiling add sufficient ammonium oxalate solution 2 to 
precipitate the lime as oxalate. Continue the boil- 
ing about one minute and then set aside until the 
precipitate settles.* Decant the solution through an 
11-cm. filter-paper, retaining the precipitate in the 
beaker, to which add a little ammonia after most 
of the solution is decanted, mix by shaking, and 
then pour into the filter. Wash the beaker 4 times 
and retain it ; then wash the paper 6 times, both 
washings being very thorough. With the paper still 
in the funnel, wash the precipitate back into the 
retained beaker. Dissolve the calcium oxalate by 
adding 5 to 7 c.c. of sulphuric acid which has just 
been added to two parts water; dilute to 200 c.c. 
with water of from 70 to 80°C. and titrate rapidly 
with potassium permanganate solution. Stop at the 
first permanent pink and add the filter-paper to the 
solution, after removing it from the funnel in such a 
manner as to collect any precipitate that has crept 
above it. Stir the paper in the solution a minute. 

iPrepared by mixing together 400 gm. ammonium 
chloride, 800 c.c. ammonia, and 1300 c.c. water. This 
amount fills a 5-pint acid bottle. 

2For this solution, 40 c.c. of a 1:24 hot ammonium oxalate 
solution is sulflcient for pure calcium carbonate = 56% 
lime. 

sTo be sure sufficient ammonium oxalate solution has 
been used, test a few drops of the clear solution with a 
drop of ammonia and some 10% solution of calcium chloride, 
a precipitate should form. 



and then cautiously continue adding the perman- 
ganate to affinal permanent pink; about 1 c.c. more 
will be required. The volumetric method for finish- 
ing is more satisfactory and accurate than igniting 
the precipitate, and where a series of estimations 
have to be made, it is more convenient and rapid. 

Sulphur. — After receiving the calcium oxalate pre- 
cipitate on the filter and washing the beaker in 
which the precipitation was made, remove the fil- 
trate receiving the paper washings in some waste 
vessel. Acidify the filtrate with hydrochloric acid, 
add 3 to 4 c.c. excess, and boil. While the solu- 
tion is boiling, precipitate the sulphur, as usual, 
with hot barium chloride solution, 4 filter, and wash. 
Label this 'Filtrate A.' 

Silica. — Heat 5 c.c. hydrochloric acid with 10 c.c. 
water and pour this over 'Precipitate A,' to dissolve 
the iron, etc. ; change beakers, if necessary, running 
the solution through a second time or until every- 
thing dissolves. Notice that everything is dissolved 
in the decomposition beaker, and transfer all the 
insoluble material from it to a filter-paper. Wash 
the paper, ignite, and weigh as insoluble silica. 

Zinc. — To the filtrate from the silica add 35 c.c. 
of ammonia solution and manganese precipitant, as 
before, omitting the water, and repeat the operation; 
filter through a new paper. With this double pre- 
cipitation of the iron, all zinc will be in this solu- 
tion and in 'Filtrate A,' which are to be combined 
after acidifying the last with hydrochloric acid. 
Washing with an ammonium chloride-ammonia solu- 
tion is not necessary with two precipitations, and 
this method never fails. 

To the combined filtrates add granulated lead, 
and about 15 c.c. more of hydrochloric acid, if the 
titration is to be made using ammonium molybdate 
as an indicator. Boil 10 min. and determine the 
zinc as usual with potassium ferrocyanide. 

By decomposing the ore in a No. 1 beaker and 
throughout the operation avoiding excess of wash- 
waters, the total bulk by the time the zinc titration 
is reached can bo held between 250 and 300 c.c. In 
standardizing the ferrocyanide solution, work with 
an equal bulk of solution. 

Iron. — Heat 5 c.c. of hydrochloric acid diluted 
with 5 c.c. of water and dissolve the iron precipi- 
tate, receiving it in the original decomposition 
beaker; boil the solution and reduce with stannous 
chloride. When cool, take up the excess with mer- 
curic chloride, and transfer the solution to a No. 4 
beaker, diluting to 400 c.c. with cold water; then 
add 10 c.c. of manganese sulphate solution 5 and 

<Five cubic centimetres of a hot 10% barium chloride 
solution precipitates 0.506 gm. BaSO,, equivalent to 13.9% 
sulphur when working with 0.5-gm. sample. 

sZimmerman-Relnhardt's solution is composed of 160 gm. 
manganese sulphate dissolved in water to 1750 c.c, then 
330 cc. thick phosphoric acid (85%) is added, and 320 c.c. 
sulphuric acid. If preferred, reduction can be made in the 
usual way with granulated lead, zinc, or sodium sulphate; 
some operators only add 5 c.c. of the phosphoric acid when 
reduction is made with either of these three. 



July 5, 1913 



MINING AND SCIENTIFIC PRESS 



19 



titrate immt'iliati'ly with potassium permanganate 
solution. 

The following scheme appears to answer every 
requirement for the teehnioal determination of lime 
in ores or limestones. It is rapid and does away 
entirely with ammonium sulphide for the precipita- 
tion of manganese rod zinc, which when employed 
always entails a tedious and long-drawn-out process. 

Treat 0.5 or 1 gm. of ore in a No. 1 beaker; if 
a sulphide, treat with 6 c.c. of hydrochloric acid, 
boil to about half the volume, then add 5 c.c. of 



nitric acid and reduce to a pasty state. If the ore 
is Oxidised, both acids can be added together. 

When a pasty condition is reached, add 40 0.0. of 
water. 3 c.c. hydrochloric acid, 20 c.c. ammonia, and 
a precipitant for manganese, as in the above com- 
bined method. Boil "> min. and filter through au It- 
em, paper, washing well with hot water. From here 
on, proceed exactly as in the combined method for 
lime: "Should filtrate not smell strongly of am- 
monia," etc. For all practical purposes, this method 
is equally as good as the longer ones. 



Braden Copper Company 

By Pope Yeatman 



•I have the honor to report that I have visited the 
Braden Copper Co.'s property in April, and the 
following covers, in general, the impressions of my 
visit : 

The plant has not been entirely completed, 
but should be sufficiently so before the end of the 
summer to be able to handle at least 3000 tons of 
ore per day. The construction and operation of 
the plant has been delayed, due, first, to the abnor- 
mal weather conditions of a year ago; second, to 
some difficulty in obtaining labor; and third, to the 
installation of the Minerals Separation process for 
the .concentration of the ores. The adoption of this 
process was decided upon last August, but all the 
machinery has not yet been delivered on the ground. 
Nevertheless, progress has been much greater than 
during previous years, and conditions are shaping 
in a very satisfactory manner. 

Development Work 

Considerable development work has been done, 
and especially in the Teniente section, where the 
main Teniente orebody has been explored for a dis- 
tance of over 4000 ft., showing ore of excellent char- 
acter; in fact, above the average grade. A connec- 
tion was made in the shaft, extending from Teni- 
ente No. 1 to No. 2, and an ore-pass was completed, 
so that all ore taken out in development in the 
Teniente orebody can be sent to the mill. A few 
cross-cuts and raises have been driven, which still 
further prove the magnitude of the Teniente ore- 
body. The principal work in the Fortuna has been 
on the No. 2 level, which is being extended so as 
to make connection by means of a winze with the 
Teniente tunnel, about 50 metres below. The faces 
of Fortuna No. 2 and Teniente No. 1 are now about 
1000 ft. apart. The No. 2 Fortuna level has also 
shown considerable ore. A new level, Fortuna No. 
2%, was started in order to mine ore between levels, 
it being found that the distance between levels No. 
2 and 3 was too great to allow for carrying up the 
pillars safely. Improvements at the mine consisted 
of the erection of more dwelling houses, quarters for 
the Chileans, and enlargement of the plant. 

Increased tonnage has been shown in the Fortuna 
orebody through the extensions of cross-cuts. The 
increase of fully-developed ore in the Teniente has 

•Report to the stockholders as consulting engineer. 



not been much, for the reason that the development 
work was done on only one level to prove the ex- 
tent of the orebody in length and breadth, rather 
than the actual volume, which would necessitate 
the driving of several more levels above the No. 1. 
While not actually blocked, the Teniente No. 1 de- 
velopment has determined an orebody of great ex- 
tent. 



Developed Oee (1) 



Orebody. 






Dry tons. 


Copper, %. 


Fortuna No. 


2 . . 




2,123,627 


2.85 


No. 


3 .. 




3,983.843 


2.66 


" No. 






6,412,456 


2.50 


No. 


4 




100,000 


3.32 


Teniente No. 


1 .. 




4,040,834 


2.75 








16.660,760 


2.65 






Pbobable Ore 


(2) 




Orebody. 






Dry tons. 


Copper, %• 


Fortuna No. 


2 




175,545 


2.65 


"* No. 


4 




2,045,000 


2.32 


'■'"»'' No. 


5 . . 




105,000 


3.20 


Teniente No. 


1 , 




2,020,417 


2.75 


No. 


3 




4,040,834 


2.75 


No. 


3* 




61,100 


2.27 


No. 


3 . . 




301,548 


2.23 








8,749,444 


2.63 






Possible Ore 


(3) 




Orebody. 






Dry tons. 


Copper, %■ 


Fortuna No. 


2 




625,500 


1.84 


No. 


3 .. 




175,545 


2.65 


" No. 


Q 




625,500 


1.84 


" No. 


4 




1,680,000 


2.28 


Teniente No. 


1 , . 




6,300,000 


2.75 


No. 


3 , 




9,295,000 


2.70 


No. 


3 . , 




41,200 


2.13 








1S,742,745 


2.61 



Robert Marsh, Jr., the mine superintendent, in 
his report of April 28, 1913, with which I fully 
agree, states: "Our greatest expectations lie in the 
Teniente mine. Here we expect to develop a large 
amount of ore above Teniente No. 1 level, and also 
between Teniente levels No. 1 and No. 3. The long- 
itudinal section through this property shows graph- 
ically what we can fairly expect. We still have 
about 400 metres of virgin ground to connect with 
Fortuna No. 2. Of this, 200 metres shows attract- 
ive outcrops. It may be possible, however, that 
Teniente No. 1 level, being over 1400 ft. deep here, 
is a little too low for the best results. 

"In addition, therefore, to the ore shown in the 



20 



MINING AND SCIENTIFIC PRESS 



•July 5, 1913 



above table, the following possibilities may be spec- 
ulated upon: 

Tons. 

Above Fortuna No. 2 and extensions 2,500,000 

Above Tentente No. 1 10,000,000 

Between Tenlente No. 1 and 3 (Doubtful, if any) 

Extensions of Tenlente No. 1 (above level) 2,600,000 

"From this it does not seem unreasonable to 
expect that ultimately 60,000,000 tons of 2,50% cop- 
per ore may be developed." 

Though operating on a comparatively small ton- 
nage, the costs have been very satisfactory, and 
it has been shown that the method of stoping will 
prove an excellent one. The electric railway, which 
gave some trouble, is working at a low cost and 
satisfactorily in spite of the heavy grade. Owing 
to the extreme toughness of the ore and the neces- 
sity for finer grinding, it was decided to increase 
the capacity of the crushing plant, and this is prac- 
tically completed. During the past year a great 
deal of work has been carried on in the new mill, 
principally in connection with the installation of 
the Minerals Separation process, which has necessi- 
tated the introduction of Hardinge mills, Minerals 
Separation units, settling tanks for dewatering the 
pulp to a proper consistence for the Minerals Sep- 
aration process, classifiers, launders, etc., but this 
work is not yet completed. Operations have been 
conducted partly with the Minerals Separation proc- 
ess and partly with the old wet concentration 
method, but, during the installation of the Minerals 
Separation process, it has been necessary to operate 
( under conditions satisfactory to neither method. 

Minerals Separation Process 

The experiments were made with the Minerals 
Separation process, under the direction of the Min- 
erals Separation, Ltd., last June and July, the pleat 
being situated in the old mill. This test showed 
the advisability of the installation of the process, 
and it was arranged to change the method of con- 
centration so as to make use of the Minerals Sep- 
aration process and a greater profit per ton of ore 
treated. The first Minerals Separation unit was 
started in the new mill on November 14, treating 
material that would have otherwise gone to the van- 
ners, but carrying the pulp less suitable for the Min- 
erals Separation process than would be furnished 
when operating the plant with the proper installa- 
tion of Hardinge mills. The results with the in- 
complete installation have not, of course, equaled 
what has been obtained in that part of the plant 
which is more thoroughly equipped. The work has 
shown, however, that an extraction in the concen- 
trator of between 70 and 75% will be obtained. 
While these results may see» low, it must be re- 
membered that some of the copper in the Braden 
ore is in the oxidized form, not capable of high 
extraction, either by the Minerals Separation or by 
wet concentration methods. 

During the year, the second blast-furnace, 46 by 
180 in., was erected and also a second Pierce-Smith 
basic converter. The second blast-furnace was 
started in April, and all the concentrate so far pro- 
duced has been smelted. Owing to the stress of 
other work, the leaching plant had not been com- 



pleted at the time of my visit, though roasting 
experiments had been carried out for some time. 
Since I left South America, however, the leaching 
plant had been started for a test run. 

The production of sulphuric acid, owing to the 
small amount of convvrsion and absorption, has not 
been sufficieVit, and it has therefore been decided 
to add a lead-chamber to increase this. The narrow- 
gage railway between Rancagua and the plant is 
in very much better condition than at the time of 
my last visit, owing to the fact that a greater 
amount of ballasting had been completed, trestles 
filled, and substantial culverts put in, replacing 
wooden trestles, and a number of curves of too small 
radius have been removed. Last summer (the South 
American winter) the abnormal rains caused many 
delays from wash-outs, as was the case with prac- 
tically all the railways in Chile. 

Power Station 

The electric power station is completed with the 
exception of a fourth unit, which will serve as a 
spare or for the operation of the present leaching 
plant. So far it has not been necessary to run more 
than two units, and neither of these at full capac 
ity, but with the increased production of the next 
few months, the three units will have to be run reg- 
ularly. The abnormal weather of last year also 
caused wash-outs on the canal and caused some de- 
lays last winter. Much of this should be obviated 
in the future. During the last year improvements 
have been made in the way of erection and comple- 
tion of staff quarters, store and warehouse, and 
single and married quarters, both for the Chileans 
and the foreigners. Probably the largest piece of 
outside work has been in the direction of the flume 
line and dam. to cut out the tailing, which hereto- 
fore had gone into the Coya river. 

The next few months will witness a decided in- 
crease in production. Enough has been done to 
prove that the cost for producing copper will be 
below the limit estimated some years ago, namely 
7.5c. The developments in the mine within the last 
year, ccftpled with work done in treating ores, gives 
added confidence in the future of the property and 
suggests the desirability of increasing the scale of 
operations. 



Dredging the Cucaracha Slide, Panama 

A relay pumping station is being installed on the 
west side of the Culebra cut, near the bridge of the 
Panama railroad over the Rio Grande, in anticipa- 
tion of dredge excavation at the foot of Cucaracha 
slide. The plan as at present contemplated involves 
passing the discharge pipe-line of two suction 
dredges across the cut on pontoons, and up the west 
bank to the relay station; thence down the valley 
of the Rio Grande about 4000 ft., to discharge west 
of Cerro Luisa, the hill at the outer end of Pedro 
Miguel dam. It is probable that an earth dam will 
be thrown from the lower end of Pedro Miguel lock 
to the hills on the other side of the river, a distance 
of about 1500 ft., and the swamp west of the lock 
'will be filled with spoil from the slide. — Canal 
Record. 



July 5. VJ13 



MINING AND SCIENTIFIC PRESS 



•Jl 



Discussion 

Uclrr. of the Minis.) »X|. HciaNTinc I'm: ■» are Invited lo 
use this department for the dlecuaelon of technical anil other 
matters pertaining to mining and metallurgy. The Editor 
welcomea the oxpreaaloa of vlewa contrary to Ma own. be* 
Having that careful criticism la more valuable than caaual 
compliment. Inaertlon of any contribution la determined by 
lie probable Interaat to tha readere of thla Journal. 

Minerals Separation v. De Bavay Process 

The Editor: 

Sir — I have read with great interest T. J. Hoover's 
book on Hotation and also the article by Edward 
Walker in your January 4 issue. Having been close- 
ly connected for a number of years with both the 
Minerals Separation and De Bavay processes in 
Australia, where they are being used on a large 
scale, I would offer a few suggestions as to a com- 
parison of these processes. 

In comparing the De Bavay process with the Min- 
erals Separation process as used on Broken Hill ores, 
many factors have to be taken into account. In the 
first place, the De Bavay company was the first 
to recognize that in the treatment of Broken Hill 
tailing it does not pay to treat the slime product, 
owing to the high percentage of lead that it con- 
tains. By rejecting this slime it has been found 
that not only a higher grade, and consequently a 
more profitable zinc concentrate is produced, but the 
slime itself is kept on hand as a valuable by-product. 

Mr. Walker remarks that experience gained dur- 
ing the past year has gone to prove the efficiency 
of the Minerals Separation process over the De 
Bavay process. This certainly does not appear to 
be the case, judging by the enormous profits made 
by the De Bavay company, in spite of the fact that 
it paid higher prices for the tailing. Also, an in- 
teresting point in this connection is the fact that 
the South Mines, after various trial runs, decided 
that, from a commercial point of view at any rate, 
the De Bavay was the best process. This certainly 
does not point to the process being inefficient as 
compared with the other processes which are being 
worked on Broken Hill ores. Prom a profit-making 
point of view, the De Bavay process is ahead of 
any other process that is working on Broken Hill 
tailing at the present time. I do not refer to the 
slime. At the present time there is not much profit 
in the treatment of slime, but it is hoped that the 
experiments that are being conducted by the South 
Mines, Amalgamated Zinc, and other companies will 
be crowned with success. Mr. Walker further states 
that, moreover, there is little likelihood of the De 
Bavay process. being applied anywhere else than at 
Broken Hill, as it is obviously of inferior efficiency 
to the Minerals Separation process. Why obvi- 
ously? In the first plane, Broken Hill is not the 
only lead-zinc mining centre in the world, and also, 
with their present knowledge, the De Bavay people 
could greatly simplify the design of their plant, 
making it cheaper to erect. Mr. Walker would be 
greatly surprised if he knew the actual working cost 
of this process. I regret that professional etiquette 
prevents me from giving this information. The re- 
coveries are also high, higher than those given in 
Mr. Hoover's book, in which a crude value for the 
tailing is conveniently assumed, would lead one to 



believe. Both the De Bavay ami the MinemlH Sep- 
aration process havo their scope, but on different 
types of ore. Tin- l>c Bavay process will treat ma- 
terial through 80 mesh with 5 to 10% slime, which 
is much coarser than can be treated by the Minerals 
Separation process without crushing. For excep- 
tionally fine-grained ores, for which the Minerals 
Separation process is eminently suited, the De Bavay 
process is not vi I. In experimenting with the 
De Bavay process, the method described by Mr. 
Hoover, in his book on flotation processes, is not 
suitable, as it will give bad results on any ore. Al- 
though I have personally conducted numerous ex- 
periments on the De Bavay process, I have never 
used or seen used anywhere the method referred 
to above. The stepped cone, or rough design shown 
in Mr. Walker's article, I have never seen on the 
De Bavay plant, as the engineering skill of the De 
Bavay company is more up to date and more orig- 
inal than the design would lead one to believe. The 
De Bavay process stands as a model of Australian 
management and metallurgical skill, so lightly 
spoken of by Mr. Hoover. 

In reference to the Minerals Separation process, 
it is not generally known that it is a development 
of the Cattermole process. The first plant erected 
at the Central mine was really a large Cattermole 
plant using Wilfiey tables. In observing the tailing 
from these tables falling into the tailing boxes, n 
froth was seen floating on the top of the boxes. Im- 
mediately the Central mine staff planned out the 
scheme of flotation boxes and the treatment was 
modified accordingly. It will be seen that the proc- 
ess was made commercially successful by the Cen- 
tral mine staff and that Australians had no small 
share in its development. Thousands of pounds 
profit were made by the Minerals Separation proc- 
ess on zinc tailing before Mr. Hoover's single-level 
apparatus, which is undoubtedly the finest mechan- 
ical feature of the present plant, was introduced. 
To Mr. Lavers, chief metallurgist of the Minerals 
Separation, Ltd., in Australia, is also due the rapid 
advance of this process in treating copper ores, 
owing to his brilliant research into the adaptability 
of eucalyptus and other oils to the treatment of 
these ores without the necessity of the use of acid. 

Wilton Shellshear. 

Mt. Morgan, Queensland, May 8. 

A Correction 

The Editor: 

Sir — In your issue of June 7, 1913, under ' General 
Mining News' for the state of Nevada, on page 87f>. 
you state that the plant of the Nevada New Mines 
Co. "consists of a crusher, ten stamps, tube-mill, 
agitators, and Oliver filter." This Company has a 
Hardinge conical pebble mill in operation, which 
we believe your correspondent has mistakenly called 
a tube-mill. Will you kindly correct this misstate- 
ment in your next issue, and oblige 

Hardinge Conical Mill Company. 

New York, June 13. 

Coinage executed at the United States mints dur- 
ing the year ended June 30, 1913, was valued at 
$37,147,000, of which $30,058,000 was in gold. 



22 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 



Special Correspondence 



ALLEGHANY, CALIFORNIA 

Success of Tiohtneb Awakens as Old Distbict. — New 
Roads Reduce Fbeioht. — Geolocy and Obe Occubbences. 
— Many Mines Being Reopened. 

The success of the company operating the Tightner mine 
has aroused considerable renewed interest in this district, 
as well as surrounding ones, of like character. The pro- 
posed new road connecting it with Nevada City by a better 
and shorter route, is also stimulating activity. This road, 
which has been surveyed and is now under construction, 
follows Kanaka creek down to a point below its mouth 
before crossing into Nevada county. It is largely due to 
the Tightner people that it is being built, as they have 
helped materially on the Sierra county end. It will reduce 
the distance from Nevada City from 39 to 24 miles, and 
should materially reduce the freight and passenger rates, 
the former now being lc. per pound at the most favorable 
times of the year, and the latter by auto-stage $10 one 
way, or $18 the round trip. The fare by mail stage is $7 
each way, by the old Downievllle line to Mountain House 
and thence to Alleghany by local stage. 

The numerous veins of the district strike from north- 
northwest, to nearly east, those striking nearly north hav- 
ing an easterly dip, and the east and west veins a north- 
erly dip, as a rule. The most common association of 
country rock with the veins seems to be in contacts of 
amphibolite and serpentine, but it is dangerous to attempt 
to generalize much, as it seems to be the district of ex- 
ceptions. The fact that the bedrock series which makes 
up the country rock is not often clearly dellmlnated and 
its members merge into one another gradually, makes it 
difficult to define a contact, but the Tightner does appear to 
be on a well defined contact between amphibolite and ser- 
pentine, conforming in strike with the direction of lami- 
nation of the series, which is a little north of west. Most 
of the veins follow similar contacts, or are parallel to con- 
tacts and near lines of change of character of country 
rock, though the Gold Canon, near the southern end of the 
district breaks the rule by running nearly at right angles 
to a contact. It is strong in the amphibolite, and extends 
into the serpentine for about 100 ft., where it dies out. So 
far, no veins of consequence have been found in serpen- 
tine, nor is this rock favorable to their formation. 

The veins are usually well filled with quartz and easily 
followed, except where disturbed by faults, but the distribu- 
tion of the gold seems to be extremely erratic. It cannot 
be called a pocket country, for the gold occurs within well 
defined veins, but it is a country' of irregular distribution 
in extremely high-grade bunches occurring in certain zones, 
perhaps in the vein areas. There is nothing so far that 
resembles definite shoots, though it is claimed that with 
greater depth attained there is a more decided tendency 
for the ore to occur within certain better defined boun- 
daries, but it is likely that with more work and greater 
depth simply more is known about the occurrences. There 
are many theories concerning the best indications to fol- 
low in searching for rich bodies, among the things most 
sought are the following- a hard strongly silicified hanging 
wall, especially where accompanied by waves or rolls in 
the vein nearly vertical; the appearance of what is locally 
known as 'Blue Jay,' a greenish blue rock resembling 
jasper, evidently a highly altered product; certain small 
seams, usually quartz filled, coming in from foot or hang- 
ing; small cross-faults. The work of H. G. Ferguson, of 
the U. S. Geological Survey, who has been studying these 
occurrences there recently, should aid greatly in solving 
the problem of ore occurrence. Any or all of the indica- 
tions mentioned may be found with no ore, however. When 
a high-grade body has been found, it is best to look for 
more on a line approximately on the dip of the vein, above 
and below on a line, indicated by the synclines of waves 
in the hanging wall. Where the hanging wall is smooth 
and regular for long distances the chances of finding pay 
seem to be much less remote. The gold in the high-grade 



spots is free, usually is crystalline, and is in masses of 
arsenopyrite. This, where separated clean, Is often worth 
$50 per pound or more. This sort of occurrence naturally 
leads to "high-grading,' and the most watchful care on the 
part of those in charge is necessary to prevent it. No doubt 
considerable is stolen in spite of the most rigid inspection. 
The ordinary iron pyrite of the ores is not of much value. 
The usual concentrate made at the mills of the district 
rarely assays over $50 per ton, and often as low as $30, 
which does not leave much margin for profit after ship- 
ment and treatment from such a remote point. v The mill- 
ing is very simple, consisting simply of stamping with 
amalgamation on outside plates and concentration on van- 
ners without classification. The fact that the bulk of the 
ores are so low grade as hardly to pay for milling, while 
the bulk of the gold occurs in high-grade that really would 
not require milling except on a small scale in especially 




PLAN OF PROPERTIES IN DISTBICT DESCRIBED. 



designed mills, does not offer much encouragement for put- 
ting in milling plants. The only excuse for milling much 
of the ore is that enclosed gold would be recovered that 
otherwise might be thrown away. Electric power is gen- 
erally available throughout the district, at reasonable 
figures, and is the form of power generally used. 

Taking up the properties in detail, from north to south, 
and from east to west, the North Fork, just north of Forest 
City, is developing the downward continuation of an ore- 
body which was worked originally from a gravel channel 
drift. The new works reach it through the old Uncle Sam 
incline with a drift across the old channel, an underground 
shaft, and drifts from the bottom. It is operated by an 
Oakland company. The ore is on an amphibolite-serpentine 
contact, similar at least to that of the Tightner, and pos- 
sibly the same contact. It is too far away to be at all cer- 
tain, with the intervening country covered by andesite 
capping. 

The Red Star, formerly worked under bond by L. P. 
Woodbury and associates, is now being developed by the 
Tightner people. It is some distance northeast of the 
Tightner, but probably on a vein of the same system. The 
property is just to the southeast of Alleghany, and is de- 
veloped by cross-cuts through amphibolite, and drifts both 
ways on the vein. H. L. Johnson is said to -have taken out 
over $600,000 from a shoot near surface, before the cross- 
cut was run. After it had been run, and considerable de- 
velopment done below, the present company bonded it for 
$600,000, and with a little more development discovered 
bodies of high-grade ore, from which has been taken prob- 



July 5. 1U13 



MINING AND SCIENTIFIC PRESS 



ably more lhan that amount, with good reserves left 
l 'Miri art now twlna ilrlvrn both waya on the vein, rulae* 
are being eat at several polnta, and preparations are belnK 
made (o (ink on one ore body. There appear to be two 
pay aonea discovered, each lying approximately with the 
dip of the J*ln, thla being about 36* from the vertlcnl. 
The mine la equipped at present with a 10 by 10-ln. belt- 
driven compressor, from a co-hp. motor, Waugh stoptng 
drills, and several piston drills, side-dump ore cars of one- 
ton capacity operated by mules In trains of Ave or six cars, 
and a mill of ten stamps, with rock breaker, vnnners. and 
other machinery. The Intention Is to put In ten more 
stamps aud to I ih- reuse the air-supply by Installation of 
larger compressor as soon as the new road Is opened. Abe 
Hall, of Grass Valley. Is superintendent. 

The Twenty One. below Tlghtner, on Kanaka creek, Is 
being developed by San Francisco people, and Is the deep- 
est mine in the 'camp.' It is said to have a strong vein 
and some good ore developed. The Sixteen to One, above 
the Twenty One. had a body of high-grade ore several years 
ago. and Is still being developed. Rainbow, on opposite 
side of Kanaka creek. Is working a downward continuation 
of an orebody discovered and worked in an old gravel 
channel above. It has a long adit from Kanaka creek 
cutting the lead at 1500 ft. below the Chips Flat placer 
diggings. It Is said to have considerable pay ore developed, 
but suffered the loss of Its entire plant in early May, as 
result of placing living quarters too close to the mill. The 
Intention is to rebuild, this time with 20 stamps and more 
modem concentrating machinery. The compressor has been 
re-erected and development is proceeding. L. P. Woodbury 
Is president and manager. The Plumbago is near the 
south end of the district. It is a famous mine with a tre- 
mendous amount of development work on a strong east- 
west vein, and is very regular, dipping 30° from vertical 
to the north. There is a great extent of low-grade quartz 
left, largely as pillars, with the greatest development on 
line of the so-called Robinson shoot, where the vein is 
8 or 10 ft. wide. A 20-stamp mill is in rather poor shape, 
but operating steadily. The place is taking on renewed 
life under active policy of the new superintendent, A. J. 
Pierson, lately from Phoenix, Arizona. This property has 
Its own power plant on the Middle Yuba, about a mile 
and a half from the mine, whence compressed air is car- 
ried through a 5-in. line, while a separate generator fur- 
nishes current for mill power and for lighting. With in- 
vestment of more capital to put it in good shape and for 
deeper development, it may easily become a large producer 
again. The Gold Canon is on the Yuba, just beiow the 
Plumbago power-house. C. C. Derby is in charge as min- 
ing engineer, and is developing the downward course of 
an ore-zone evidently associated with the intersection of 
the vein and the contact which it crosses, as noted before. 
The property has a 5-stamp mill and is well equipped 
with compressor plant, etc., all operated by water-power 
developed with a high head. Sufficient ore of good grade 
has been found in development to keep the mill going with 
good results. 

The Oriental, toward the west edge of the district, is on 
an east-west vein and was extensively worked from a 
shaft on the outcrop in early days. Afterward it was pur- 
chased by people controlling the Plumbago, and was de- 
veloped by a cross-cut 4000 ft. long, tapping the vein at 
1400 ft. below the outcrop and 600 ft. below the bottom 
of the old shaft, to which a raise was made. Little more 
seems to have been done, but considering its advantageous 
position, it would apparently warrant the considerable in- 
vestment necessary to further develop the lower portion 
of the vein and equip with a milling plant. The vein 
is said to be strong and productive in the upper portion. 
The Kate Hardie, still farther west, has been worked in- 
termittently for a long time, and is still being worked with 
fair results. The vein is narrow, but produces some high- 
grade ore. The Kenyon, on the creek below the Oriental, 
but on the opposite side, has a good record for production, 
but is now closed. Conditions in general in Alleghany coun- 
ty point to increased mining activity and the conduct of 
milling operations on a large scale. 



JOHANNESBURG, TRANSVAAL 

Tin Rofrt.iao* Mink.— Coxccxtbation or MtrtiNo at Crows 
Mimu. 

Among the richer mines on the Rand, unfortunately fast 
approaching exhaustion, the old Robinson Is of especial 
notice. Last year's reiulM were not by any means low; 
for, taking the year on the whole, the mine continued to 
earn the highest profit |ier ton of any mine on the Rand. 
The total revenue last year was £1,260,529, or no average 
of £2 3s. 8ti. per ton milled. Working costs were £451,769, 
or Ins. 8d. per ton, leaving a working profit of £808,760, 
or no loss than 28a. per ton. Satisfactory as are these 
figures, they do not compare well with the early achieve- 
ments of this mine. Starting milling operations In 18SX, 
when ore-reduction methods on the Rand were etude com- 
pared with those of today, the recovery averaged no less 
than £12, the costs of working being at that date about 
£3, thus leaving a working profit of £9 per ton. In two 
years the yield fell, however, to £5 per ton, and the work- 
ing costs to £2, while five years ago the yield was under 
£3 per ton. Since milling operations commenced at the 
Robinson mine, over 6,000,000 tons has been crushed, and 
4,115,137 oz. of gold recovered, of a total value of £17,300,- 
000, or an average of 58s. per ton. Of this large amount, 
over £9,000,000 has been paid in dividends. The mine Is, 
however, rapidly approaching exhaustion, and has already 
ceased to hold the reputation of having the highest yield 
of any mine on the Rand, that distinction at the present 
time being held by the Meyer & Charlton. Last year the 
development footage at the Robinson showed a marked 
decline, and only amounted to a total of 5S23 ft., and 
soon the whole of the mine area will have been developed. 

The Crown Mines Co. may be regarded as the pioneer 
of what, for want of a better definition in Rand mining, 
is called the Kimberley system of mining, the chief fea- 
tures of which are to concentrate all underground oper- 
ations as closely as possible. To carry out this idea, a 
large main level is being driven, on the horizon of No. 13 
level, from one end of the property to the other, and 
which is now completely equipped and at work between 
No. 1 and 7 shafts. During the year, this level was driven 
984 ft., and is already 1567 ft. west of No. 7 shaft, but 
it has still 4500 ft. to be driven before it reaches the 
western boundary of the property. This level is equipped 
with an elaborate electric-haulage system, and is intended 
to deal with an output of 10,000 tons per day, and to 
supply both No. 5 and 7 shafts with ore. New crusher 
stations have been erected at the head of these two shafts, 
and a system of electrical transport of the crushed ore 
to the mills arranged in such a manner that all the mills 
are linked up with the system. Over £1,250,000 has been 
spent in this work, and when the whole arrangement is 
in full swing, lower costs and higher profits are looked 
for. All the large amalgamated properties on the Rand 
are now adopting this system of main-receiving levels for 
the concentration of underground operations, and in the 
face of the higher costs of working in general on the 
Rand, it is hoped that the system will bring about the ex- 
pected reduction in working costs. 



BUTTE, MONTANA 

Collapse of Butte Central. — Butte & Superior and Elm 
Orlu. — Secondary Enrichment at Butte. — A. I. M. E. 
Meeting. — New Copper District? 

For the second time the old Ophir mine has proved dis- 
appointing to its owners. After a meteoric career in the 
stock market and in the newspapers, the Butte Central 
Copper Co. is rapidly dropping into oblivion, leaving its 
stockholders in a bad mood. The mine and mill are now 
closed and attached by unpaid employees. The former 
collapse came after a vain attempt to make a copper mine 
out of a typical manganese-silver vein. The present calam- 
ity results from imagining the existence of commercial 
silver-gold orebodies where none were to be found. Both 
failures were due to lack of conservative engineering ad- 
vice as against that of the old-time miner and practical 
man. It is one of the numerous cases where it is difficult 



24 



MINING AND SCIENTIFIC PRESS 



July 5. 1913 



to fix the blame. The whole miserable fiasco ran be ade- 
quately explained on the grounds of ignorance and inex- 
perience In the executive side of mining. If the directors 
had been wise- enough to take their money and mine to 
reputable engineers in this country or in Europe, and say, 
'Here is what we have, can anything be .done with it?' they 
would have been told, after proper investigation, either 
to distribute their money or look for something else to 
invest in. But in such a promotion as Butte Central, the 
promotion and management of the enterprise usually get 
so badly Interwoven that the men who raise the money 
usually want to run the mine in person, partly from a sense 
of responsibility to their clients, it may be, but also, in 
many cases, because of the remuneration connected with 
such management. Such remuneration may be either 
direct in salaries, as In the promotions of Stephen R. Dow 
of Boston, or indirect, as inside Information useful in 
stock manipulation. 

It Is rumored that the Butte & Superior Copper Co. 
and Elm Orlu Mining Co. have been considering consol- 
idation in order to avoid the troubles of probable litiga- 
tion over doubtful orebodies. W. A. Clark, of the Elm 
Orlu interests, denies this, however. It is at least cer- 
tain that both parties are doing everything possible to 
avoid bringing their differences into the courts, and the 
community at large wishes them success. In the mean 
while, the Butte & Superior mill is doing good work 
with the zinc ores, and the Elm Orlu Is not pushing the 
construction of Its much-heralded mill on Timbered Butte. 
All of which is food for thought. 

Butte can claim distinctions of many kinds — namely, 
largest mines, biggest copper productions, biggest mining 
town, strongest labor unions, ugliest appearance from a 
distance and possibly from nearby, worst moral reputation 
undeserved, etc. — but one of its unique distinctions is as 
a battle-ground for theorists on genesis of ore deposits. It 
certainly has them guessing, and they come in numbers 
to examine the 'strange' orebodies and speculate on their 
origin. The bone of contention is the copper-glance ore. 
According to all theories held heretofore, this should have 
been worked out long ago. But the mines are still in 
operation. Neither has the chalcoclte cut out, which 
causes much comment. A big battle of geologists will 
probably take place in August, when the American In- 
stitute of Mining Engineers meets at Butte. Some people 
think that the chalcocite did not form from descending 
sulphate solutions, with attendant secondary enrichment, 
and will be there to prove it. Others are equally con- 
vinced that that is the way It did form, and will also be 
(here to prove it. The advance guard of some of the 
contestants has already arrived in the persons of L. C. 
Graton and their associates, who are here with apparatus 
for investigation. The Graton-Murdock idea of examining 
the ore relations microscopically is really something new, 
and worth while. Incidentally, these geologists will have 
one big advantage, In that their opponents will have to 
get microscopes and polished sections, too, before they 
can dispute anything. Mr. Graton and his crew are out 
to clean up this subject of secondary enrichment of cop- 
per in general. They expect to spend several years at it, 
from Alaska to Mexico, and possibly elsewhere. They are 
a 'live bunch' of young scientists, and something should 
come from their endeavors. 

The geologists are not the only ones interested in the 
August meeting of the American Institute of Mining En- 
gineers at Butte. In fact, in point of numbers, the geo- 
logical papers are almost eclipsed by the metallurgical 
and mining papers. More than 40 papers have been pre- 
pared for this meeting, and nearly every phase of milling 
and smelting practice in Montana will be covered. These 
papers, and the resulting discussion, promise to be so 
instructive that no live metallurgist can well afford to 
be absent, and it is probable that very few of them will 
be. The thoughtful onps are already making hotel en- 
gagements for themselves and friends, and the local com- 
mittees are busy making things ready for the mental and 
physical needs of their fellow engineers. 

There Is so much loud talk going the grounds about « 



'second Butte' In Flathead county, Montana, that we are 
beginning to think that some of the old Nevada expert 
boosters and 'wind-jammers' have Invaded the land. Noth- 
ing is known here against the new camp except the talk 
and newspaper mining. It is hoped that it will prove 
ten times bigger and better than Butte, it only for the 
purpose of giving the Copner Producers' Association some- 
thing new to thjnk about. It must be confessed that, so 
far, no intelligent coordinated description of the conditions 
has been forthcoming. These mysterious new bonanzas 



III l| 

n j 


111 
II 









mm 




m 

J 



7 TV 



END-VIEW OF 2400-VOLT GENERAL ELECTRIC LOCOMOTIVE. 

are said to bo northeast of Flathead lake, about 30 miles 
south of the Great Northern railway, and of course in a 
densely wooded, out-of-the-way locality. 

The electrification of the Butte, Anaconda & Pacific rail- 
way is nearly completed, and the electric locomotives will 
soon be displacing the steam-engines. The electrical en- 
gines are queer but powerful-looking affairs. They re- 
semble from without old stnbby box-cars, such as section 
gangs inhabit on the sidetrack. They are not impressive 
and powerful looking like the big steam locomotives they 
are to displace. But looks are deceptive, apparently, as 
they can pull more than their predecessors, and cost more, 
too, $40,090 being the price of each In round figures. As 
the main ore line for Anaconda passes through the best 
residence section of Butte, the people are glad to see the 
change coming, in the hope that the, new motive power 
will not be so noisy and dirty as the old steam-engines. 

The slime and sand from the concentrator at Anaconda 
are being made into tile and bricks at the Washoe brick 
plant. The product is experimental so far, but gives prom- 
ise of success. 



NEW YORK 

Braden Report. — Chile Copi-ee. — Metal Pbices. — Amalga- 
mated Dividend. — Ohio Copper. — Mexican Conditions. 

The expected increase in the ore reserves of the Braden 
mine was announced in a report by Pope Yeatman, made 
at the stockholders' meeting June 23. The report is re- 
viewed on page 19. Earlier in the week Braden called for 
redemption $68,500 of its 6% bonds, and a few days later 
canceled the call on the ground that redemption might 
lead to dissatisfaction on the part of those bondholders 
who paid higher prices for the bonds than the redemption 
figure. Braden bonds sold as high as 210 when the stock 
was at 101,4, so that the present level of around 7 is a 
poor one at which to effect conversion. There have been 
persistent rumors that some new financing of Braden will 
be necessary, but they have been as persistently denied. 
Thomas W. Proctor has been appointed a master by the 
Supreme Court in Boston to hear the suit of Louis Ross 
against A. C. Burrage to recover a share in the promotion 



July ;>, 1!>13 



MINING AND SCIENTIFIC PRESS 



■>:> 



proDtt of th* Chile Copper Co. A* It I* expected (o hnv. 
thai Com puny at work within thro* yearn, producing cop- 
per at the rate of 300,000 lb. per day. at a coat of Gc. 
per pound, It look* aa thutiKh the aupply of cheap copper 
la In no Immediate dander of exhuuatlon. At any rule 
that la evidently the view of the conatiinera, for mini' nl 
the big buyers have come Into the market during the paat 
week. Producer* hoi>e for a speedy reaumptlon of buy- 
ing at the 16c. level, but meanwhile amall loi* bave 
changed handa nt aa low aa H\c. Kuroi>eun aellera are 
reported to he out nt the market for July-August deliveries 
Indicating that they are sold out of spot. Aa much spot 
remains to be purchased, the aellera have the London ipot 
altuation In their handa. The A. S. & R. Co., on June 87, 
waa quoting £69 In London. The Nichols refinery Is still 
tied up by the strike, so Phelps. Dodge A Co. are entirely 
out of the murket. Small sales of lake copper were made 
at 13»ic. by a company which needed the money more 
than the copper. Consumers freely state that they are in 
no hurry to buy. expecting to get bargain prices later 
Exports of copper for the week ended June 26 were 622*! 
tons, a total since June 1 of 25,341 tons. Exports during 
the some period last year were 21,930 tons. 

Reduction of the dividend rate of Amalgamated Copper 
is rumored, and is evidently more than a possibility, since 
the copper metal market Is sn weak and is threatening to 
sag lower. Amalgamated Is a peculiar stock: It sells now 
but little above A. S. & R., although It is paying 6% and 
the latter only V:' r . It Is quite possible that the decrease 
has already oeen discounted, just as the stock sold at a 
higher figure just before the increase to 6"7r was announced 
last fall than It has ut any time since. Giroux stockhold- 
ers have already deposited more than a majority of the 
shares of that concern for exchange in the new Copper 
mines merger. By the laws of Delaware, 65% of the stock 



must be exchanged in order to give the Coppermines com- 
pany "physical control" of the Giroux, and the deposit of 
shares is expected to reach that figure before long. It is 
stated that leading interests in the merger have agreed 
to underwrite a large part of the $3,000,000 7% bond issue 
which it is proposed to float. 

After having been postponed four times, the annual 
meeting of the Ohio Copper Co. was held in Boston on 
June 25. The board, as elected, consists of W. O. Allison. 
F. A. Heinze, J. W. McKinnon, J. W. Pierson, Jr.. W. C. 
Lewis, W. I. Badger, and Maurice Levy. Mr. McKinnon 
represents the Assets Realization Co., controlling 163,000 
shares of Ohio which formed part collateral of the $1,000,- 
000 loan negotiated by the United Copper. Mr. Lewis 
represent? Walker Bros, of Salt Lake City, and Mr. 
Badger is said to have been elected because of large 
personal stockholdings, although he has acted as legal rep- 
resentative for Heinze for a number of years. It is said 
that Heinze no longer controls Ohio, and will probably 
not be elected chairman of the board at its organization 
meeting. The United Copper is about to drill its coal 
property, held by the New York & Pennsylvania Coal Co.. 



mid until thll work la finished no reorganisation pluim 
will be formulatrd. It bus always bean claimed that this 

■ on I property formed an exceedingly valuable naset, and 
i he Investigation uf the value will be a correspondingly 

■ .ireful one. 

Mexican railways are In a nervous state. It was re. 
ported on Juno 27 that the National Hallways of Mexico 
had been placed In the hands of a receiver, J. M. Gul- 
limit h. the mannger In Mexico City for the Waters-Pierce 
Oil Co. Following the announcement of the resignation 
of E. M. Brown from the presidency, this created some 
consternation, but the report Is doubted by the banking 
houses concerned. The resignation of Mr. Brown Is also 
denied. Nevertheless, It Is evident that the situation of 
the railway Is bad, nnd It would not be strange If before 
long the Mexican government has the obligations and 
the bankers have the railway. A report from the United 
States Consul at Chihuahua states that railway commu- 
nication has been shut off for more than three weeks, and 
the latest reports from Chihuahua Indicate that everything 
south of Juarez Is in the hands of the Carranzistas, and 
Juarez may fall at any time. General Pedro Ojeda tried 
to force his way from Guaymas to Hermoslllo, but was 
beaten back, and Guaymas Is nearly in the hands of the 
state forces. On July 1 the bankers interested will offer 
for sale $8,500,000 of the 6% Mexican government bonds, 
and $14,250,000 will be Issued In France, and $7,250,000 
In England. It Is reported that the French bankers are 
taking them at 89 and hope to sell them for 95 or better, 
so Mexico will have to pay well for her money. The A. S. 
& R. Co. has been having a hard time in Mexico during 
the past year, as the operations have only been on a 50% 
basis nt times and are now about three-quarters of nor- 
mal, with one more furnace about to be blown in at. 
Aguascalientes and two more at Monterey. Earnings are 



J 



showing a decrease, but the company officials maintain a 
cheerful attitude. Rumblings, of a threatened suit by the 
Government for the dissolution of the 'Smelter Trust' con- 
tinue to be heard, so the stock market outlook for the 
'Guggenheim' issues is not as bright as it might be. 



JOPLIN, MISSOURI 

UNDERWRITERS LAND CO. ACQUIRES YELLOW JACKET LEASES. 

— Mining from Flat-boats in Drifts of Yellow Doo 
Mine. — Zinc and Lead Notes. 

The Underwriters Land Co., operators of the Priscilla 
mine in the West Joplin district, has acquired the fee to 
132 acres of the McBee land in the Klondike camp, six 
miles northwest of Joplin, for a consideration of $50,000. 
J. H. McBee and associates owned the tract, which was 
not worth $50 an acre, so far as was then known, three 
years ago. Development by the Yellow Jacket Mining Co. 
disclosed good zinc and lead deposits, the former ore pre- 
dominating. O. W. Sparks opened the Yellow Jacket mine, 
which is a good producer of top-grade zinc sulphide ores. 
The faith of the Underwriters Land Co., which has operated 




FEDERAL SOLDIERS IN CAMP. 



26 



MINING AND SCIENTIFIC PRESS 



July 5. 1913 



in the Missouri-Kansas-Oklahoma district for many years, 
in the future possibilities of the zinc and lead industry, is 
one of the best advertisements the district can have. 

While the Underwriters company is extending its work 
in the West Joplin districts, work has been suspended in 
the formerly rich mines north of Webb City. The pumps 
have been withdrawn from the old Yellow Dog workings 
and the water has risen in the old drifts. Sub-lessees are 
working the rich old pillars that yet remain. They carry 
the ore from these pillars to the shaft with the aid of 
large flat boats. It is hoisted to the surface and cleaned 
by hand jigs. The Yellow Dog is one of the famous old 
producers of the district. The removal of the pumps will 
make pumping operations much more difficult in adjoining 
properties to the south. A substantial concrete dam sep- 
arates the Yellow Dog drifts from the workings of the 
mines to the south. When the water rises over this barrier, 
which Is 27 ft. in height and about 75 ft. long, the workmen 
in adjoining mines will be working far beneath the water- 
level of this expansive underground lake, -which will be 
scores of acres in extent. The pumps at the Yellow Dog 
were throwing 3000 gal. per minute, or 4,320,000 gal. per 
day. The concrete dam is constructed at a depth of 200 ft. 
beneath the surface. 

Interest in large mining operation centres in the West 
Joplin district, at this time, where some big milling pro- 
perties are being opened. On the Rlseling estate, sheet 
ore is being blocked out in a number of drill-holes at a 
depth of approximately 200 ft. The surface is flat prairie 
and has not been mined extensively. It has only been 
within the past few years that mining operations of any 
importance have been carried on in this region. The ore 
as a rule shows a mill recovery of about 3.5% zinc sulphide 
with some lead. In places, the lead ore is especially rich. 
The sheet-ore district is being blocked out over an area of 
three miles east and west, and about two miles north and 
south. Among the operators that are active in this work 
are O. W. Sparks, J. M. Short, the Underwriters Land Co. 
and the St. Louis-Joplin Lead & Zinc Co. Work on the lat- 
ter's land is of unusual interest, in view of the greater ex- 
tent of the mineral formation. 

A new concentrating plant is being constructed by the 
Kansas City Mining Co. on a lease of the Rex land, east 
of Joplin. The shell of the mill was moved from the Duen- 
weg camp. Dirt from half a dozen small 'gouges' will be 
handled over the plant. Drilling for deeper ore is now in 
progress. 

LONDON 

ZINC Cohpobation and Flotation Peocesses. — Mcrex Mag- 
netic Co.'s Affaibs. 

On many occasions I have given records of the doings 
of the Zinc Corporation, which was formed in 1905 by 
Bewick, Moreing & Co. for the purpose of treating the 
great stacks of zinc tailing at Broken Hill. The early 
days were occupied in accumulating expensive experience 
in connection with the many flotation methods then at- 
tracting attention. Engineers with varied experience at- 
tempted to apply the rival processes, the action of which 
was little known. Eventually the Elmore vacuum plant 
came to the rescue of the almost bankrupt company; but 
in 1910 the improved Minerals Separation process asserted 
itself as by far the cheapest in first cost and in working, 
besides having a wider scope as to material. During the 
past two months two subsidiary processes have been adopt- 
ed, of which details are given later. In the middle of 
1911, it was decided to acquire the South Blocks mine, 
and thus become a mining company, instead of depend- 
ing on dumps and tailing produced by other companies. 
A further venture in this direction is to be chronicled in 
the acquisition of the control of the Sunny Corner mine 
in New South Wales, floated as a separate company called 
'Zinc No. 1." The South Blocks mine contains two lodes 
outcropping on the surface, in which lead and zinc pre- 
dominate, respectively. Development has been centred on 
the lead lode. On the first seven levels, this lode has 
proved to average about 10 ft. wide, but on the eighth 
it is no less than 80 ft. wide. An inspection of the 



mine plans leads to the conclusion that the zinc lode also 
is a spur of this deep wide lode. As the ore disclosed 
on No. S level is higher in quality than the average of 
the mine, it is obvious that the outlook is excellent. As 
regards the two new processes mentioned above, the first 
is the invention of the mill foreman, James Lyster. Its 
object is to float the gal»ua out of the slime produced in 
the lead-coneeStiation plant that treats the ore from the 
South Blocks. The second is E. J. Horwood's roasting 
process intended for the treatment of the zinc slime that 
comes from the zinc-concentration plant. Mr. Horwood's 
process consists in giving a roast at a low temperature suf- 
ficient to coat the galena with sulphate, but not affecting 
the blende. Thus, in subsequent flotation, the blende 
rises and the sulphated galena sinks to the bottom. I 
should add that the flotation business, since the erection 
of the Minerals Separation plant In 1910, has been in the 
hands of Theodore J. Hoover, first as engineer to Min- 
erals Separation and subsequently as managing director 
of the Zinc Corporation. During the year 1912, 13S.2S4 
tons of South Blocks ore was treated, averaging 16.3% 
lead, 9.16% zinc, and 2.57 oz. sliver, from which 25,227 tons 
of concentrate was recovered, averaging 67.3% lead, 6.2% 
zinc, and 9 oz. silver. The zinc-concentration plant treated 
the zinc tailing from the lead plant, and tailing from 
the various purchased dumps, the total being 345,425 tons, 
averaging 14.41% zinc, 5.5% lead, and 6.94 oz. silver. From 





ZINC COBPOBATION PLANT AT BBOKEN HILL. 



this, 85,354 tons of zinc concentrate was obtained, averag- 
ing 47.2% zinc, 7.4% lead, and 12.5 oz. silver, and 10.SS1 
tons of lead concentrate averaging 57.9% lead, 14.8% zinc, 
and 32.2 oz. silver. The sale of concentrates brought an 
income of £644,428, and £206,433 was distributed in div- 
idends. 

Mr. Hoover has recently extended his interest in flota- 
tion by becoming consulting engineer to the Murex Mag- 
netic Co. This Company provided one of the Stock Ex- 
change booms four years ago, and the shares were rushed 
to absurd prices. The people behind it were connected 
with the Shell oil group. As has often been recorded, 
the process consists of adding oil and magnetite or other 
magnetic mineral to the crushed ore, and removing the 
agglomerated magnetite and sulphide by means of mag- 
nets. The advantage is that, as no acid is used, the proc- 
ess can be applied to ore that contains much calcite or 
other carbonate. The process is in use at Corboda copper 
mine in the South of Spain, at the Whim Well copper 
mine in the northwest of Western Australia, and at mines 
in France and Germany. But the board and control have 
proved to be inefficient in business instincts. A bad mis- 
take was made in connection with the terms under which 
the South Blocks Extended mine was financed by Murex 
funds, and the whole of the money thus advanced has 
been lost. The Company is at the end of its financial 
tether, and is to be reconstructed with the object of raising 
a few thousand pounds in order to continue its existence 
until such time shall arrive that substantial royalties are 
received. The shareholders have done well in putting 
things in the hands of an expert with good connections 
like Mr. Hoover. Under the old regime, engineers all 
over the world were inclined to regard the Murex com- 
pany dubiously.. They will be more ready to investigate 
now that a reliable engineer is at the helm. 



July 5, 1913 



MINING AND SCIENTIFIC PRESS 



27 



General Mining News 



ALASKA 

Junto 

The Alaska Mexican stamp-mill crushed 20.286 tons of 
ore In May, producing $54,052 from amalgamation and 
concentrate. Operating expenses were }23,591, and con- 
struction 12180, leaving a profit of $28,280. 

The Alaska Treadwell stamp-mills crushed 71,512 tons 
of ore, producing $190,072. Operating expenses were $86,486 
and construction $8197. leaving a profit of $96,389. 

The Ready Bullion and 700-FL Claim mills or the Alaskn 
United crushed a total of 36,672 tons of ore In May, yield- 
ing $84,452 from amalgamation and concentrate treatment. 
Operating expenses were $56,130, and construction $2181, 
leaving a profit of $24,841. 

ARIZONA 

Cociiise County 

The Mascot Copper Co., three miles from Dos Cabezas 
and about 17 miles east of Wilcox, the nearest railroad 
l>olnt, promises to begin shipping shortly. 

Ore-blna are being built at Wilcox, and auto-trucks will 
be used to haul ore and supplies to and from the mine. A 
steam hoist of 1000-ft. capacity has been Installed. Two 
drills arc In operation, and one hole was put down 1500 
ft .In Dos Cabezas mountains, good vanadium ore has 
been discovered. 

Gila County 

(Special Correspondence.) — At the New Keystone mine, 
retimberlng of all the drifts has been completed. As there 
has been no work In the way of development performed 
during the past year, the ore reserves are still estimated 
at 2,500,000 tons of 2.25% copper ore. The delay in treat- 
ment of Keystone ore is accounted for by the existence 
of so much oxidized ore in the property, rendering treat- 
ment by the usual methods uncertain. K. C. Canby, who 
Is experienced In low-grade ore treatment, will subject 
the Keystone ore to thorough tests during the coming 
months. It is probable that his experiments will include 
the erection of a small experimental mill on one of the 
extra foundations laid down when the Miami mill was 
built, especially so, as the experiments to be conducted 
by Mr. Canby will be valuable to the Miami company, 
with Its large tonnage of oxidized ores which must be 
treated by leaching. Mr. Canby laid out a program of 
tests here in March, and since then has been investigat- 
ing the recent developments at Anaconda and other large 
plants throughout the country. He was in charge of the 
old ferric-chloride process tested by Hunt and Douglas 
twenty years ago. 

The position of the Iron Cap is improving every day. 
The cross-vein found recently has been cut in both 
directions until the width of the orebody at this point 
is 30 ft. The face of the main drift continues in rich 
copper ore, and has straightened out again to its main 
easterly course. On the 800-ft. level the same vein is 
being followed from a point about 78 ft. east of the shaft. 

Miami, June 25. 

(Special Correspondence.) — The Apache group of claims, 
situated in Richmond basin, and owned by Pfeister Bros, 
of Globe, has resumed shipping ore to the Old Dominion 
smelter. The ore averages 25% copper and is high in iron 
content. It occurs in a contact of lime and quartzite. 
Transport over 12 miles is done by mule-teams. 

Miami, July 1. 

Improvements at the Ray mill at Hayden, consist of three 
more settling tanks to take care of overflow water from the 
16 concentrate bins; the return water pipe-line is finished; 
and two more Green chain-grate stokers are being installed 
at the power-plant. 

The Old Dominion Copper Mining & Smelting Co., at 
Globe, will place in operation additional electrical equip- 
ment, including two 815-kva. alternating-current genera- 
tors; two 100-kva. synchronous motors; one 150-hp., six 75- 
hp., one 50-hp., one 20-hp., and three 10-hp. motors, and 



twltchbonrd panels. Thli apparatus ttni been ordered 
from the General Electric Company. 

Mohave County 

The Oold Road mine produced $80,000 In gold during 
throe weeks of June. 

A crosB-cut on the 250-ft level of tho 8llver Hill mines 
nt Chloride, disclosed n body of ore ranging from five to 
H'ven feet, the average value of which la said to be In ex- 
cess of $70. This mine has been Idle tho past 26 years 
and the ore was only fr.und on the property by accident. 

A large orebody has been opened In the New Jersey mine, 
nt Chloride. The drilling plant for the Kingman Copper 
Mining £ Milling Co. will soon be ready for Installation. 
The Tennessee mine shaft, at Chloride, Is being Bunk deeper. 
Good ore Is being opened on the 900-ft. level. 

Pima County 

(Special Correspondence.) — The Empire Zlno Co. is 
working about 40 men on the old San Xavler claims in 
the Pima district, Borne 20 miles south of Tucson, and Is 
shipping about 50 tons of ore per day. The ore contains 
silver and gold. The copper-bearing portions of the claims 
will soon be worked again. 

Tucson, June 26. 

The Old Mammoth mine, which has produced a great 
deal of gold, has been bought by the Great Western Copper 
Co., represented by W. J. Young and brother, for a con- 
sideration said to be about $150,000. The deal was closed 
in Detroit with the previous owner, named Fletcher. The 
Great Western Copper Co. has had engineers testing the 
ore for the past two months. Development will be started 
on the 700 and 800-ft. levels. Below the former level thero 
is said to be a large shoot of ore carrying gold, $9 per ton, 
and 4 to 6% copper. 

Yavapai County 

(Special Correspondence.) — The Hull tunnel has been 
driven more than one mile, and is to be cut right through 
the mountain. A winze is being sunk 5000 ft. from the 
entrance to the tunnel, on a promising vein opened by 
the tunnel at that point. The tunnel will connect under- 
ground with claims on both sides of the mountain. 

Jerome, June 26. 

Ample capital has been provided for the development 
of the Harqua Hala mine of the Yuma-Warrior Mining Co. 
This mine has produced a good deal of gold in the past. 

The Hidden Treasure Mining & Development Co. is sink- 
ing the winze from the adit of the Monte Cristo mine. The 
bottom of the winze shows 10 to 14 in. of rich gold and 
silver ore. 

CALIFORNIA 

Kern County 

The Midway Gas Co. will increase its delivery this week 
from 7,000,000 to 15,000,000 cu. ft. per day, following the 
bringing in of new gas wells in its territory. The Asso- 
ciated Oil Co. has recently brought in two new gas wells, 
and the Honolulu Oil Co. another. The new production 
within the past few weeks will amount to nearly 100,000.- 
000 cu. ft., open measurement, which will be reduced to 
15,000,000 to 20,000,000 ft. under pressure sufficient to 
carry to Los Angeles. 

Sierra County 
A stamp-mill may be erected at the Red Ledge mine, 
7 miles west of Alleghany. J. B. Moulton is in charge. 
The 3-stamp mill at the Kate Hardy, at Forest, is work- 
ing again. Mine development is encouraging. A. D. Grant 
is in charge. 

Trinity County 

(Special Correspondence.) — The Enterprise is the only 
mine being worked in the Helena district. It is operated 
under lease by R. H. Skinner, J. D. Day, and F. C Meckel. 
The 10-stamp mill is working one shift, but as there is 
plenty of ore opened, another shift will be started. Other 
properties are being prospected, and generally the posi- 
tion is encouraging. 

Helena, June 20. 

Tuolumne County 
(Special Correspondence.)— The water in the Dutch 



28 



MINING AND SCIENTIFIC PRES^ 



July 5. 1913 



mine, at Quartz, has been lowered 250 ft. since the work 
ot unwatering to bottom began. It is estimated that the 
rumps must continue in operation for at least two months 
longer to finish the work. It is the intention to open 
much new ground In the lower portion of the mine by 
driving. Work has for a long time been confined to the 
upper levels of the property. The Columbia Basin mine, 
a deep gravel property, situated near Columbia, is to 
be reopened for the resumption of mining work. During 
the last period of activities at the property, a fine sur- 
face equipment was put in and extensive development work 
was done. Preparations are being made by John Segale 
to begin mining operations in the bed of the Tuolumne 
river above the Clio mine. The stream will be diverted 
from Its natural course by constructing a dam and large 
ditch. It Is expected that the shaft at the Experimental 
mine, above Columbia, will cut the vein within a few 
days, when driving will begin. It has almost reached the 
depth of 300 ft. A mill-test is to be made of ore from 
the Sonnet mine, in the Columbia district. A large new 
pump has been Installed at the Shawmut mine at Jack- 
sonville. 

Sonora, June 28. 

COLORADO 

Colorado is the most important coal-producing state west 
of the Mississippi river, and ranks seventh among all 
the states. The coal mined in 1912 was 10,977,824 short 
tons, an increase of 820,441 tons over 1911, according to 




COLOliAlX). MINERAL AREAS I.N BLACK. COAX IN SOUTHEAST. 

E. W. Parker, of the United States Geological Survey. 
The value increased from $14,747,764 to $16,345,336. The 
total area underlain by coal in Colorado is estimated at 
17.130 sq. miles, and about 60% of that entire area is 
believed to contain coal that is workable under present 
conditions. The state contains areas embracing over 4000 
sq. miles, about which little is known, but which may 
contain workable coal, and nearly 3000 sq. miles in which 
the coal lies under heavy cov^r and is therefore not work- 
able at present. In point of production, the most impor- 
tant area is the Trinidad field, underlying considerable 
portions of Huerfano and Las Animas counties, which in 
its southern extension into New Mexico as the Raton field 
is also the most Important producer in that state. The 
coal of this field is a high-grade coking coal, probably the 
best coal of that grade in the Rocky Mountain states. 

The San Juan 

During May the Tomboy mill worked 29 days, crushing 
12,000 tons of ore yielding $25,000 and $59,000 from 1550 
tons of concentrate shipped. The profit amounted to 
$35,000. 



IDAHO 

Bonnes County 
The Buckhorn Mining Co. Is building a 5-stamp mill on 
the east fork of Deer creek. The development of this 
mine consists of 2000 ft. of adits. Assays run from $16 
to $40 per ton A wagon-road has been constructed to 
this mine aad the crew employed at the mine consists of 
18 men under the charge of William Johnson. It Is ex- 
pected that there will be water enough to be used to run 
the mill when ready for operations. 

Cleabwateb County 

A gold nugget weighing 19.6 oz. and worth $290 was 
found by G. V. Friedman at his placer claim on Snake 
creek. The gravel here averages 60 to 70c. per yard, and 
the nugget was found at a depth of 10 feet. 

Idaho County 

The Moscow mine is changing hands. Mill equipment 
is of a crude type to treat the low-grade ore mined. 

Shoshone County 
The Big Creek Leasing Co. has been incorporated at 
Kellogg with a capital of 5000 shares of $10 each. Its 
object is principally leasing work. The Interstate and 
Callahan mines are now connected by a 5400-ft. tunnel, 
which is being extended 2000 ft. to tbe Amazon-Manhattan. 
This property is under option to the Interstate for $160,000. 
A 300-ton mill is operated by the latter. Ore from, the 
mine is conveyed to the plant by an aerial tramway of 
1000-ton daily capacity. The orebodles in the various prop- 
erties are rich in lead, silver, and zinc. The silver yields 
as high as 50 oz. per ton, 76% lead, and 59.7% In zinc, 
and the new mill is making an extraction of 95% of the 
mineral content. 

MONTANA 

The production of coal in Montana in 1912 was 3,043,- 
495 short tons, valued at $5,342,168, according to E. W. 
Parker, of the United States Geological Survey. This is 
the first time that the output of the state has passed 
3,000,000 tons. The coalfields of Montana are widely scat- 
tered and their output ranges in quality from lignite to 
a bituminous coal of fair grade. Nearly all of the east- 
ern third of Great Plains portion of the state is under- 
lain by lignite and low-gTade sub-bituminous coal. Toward 
the mountainous district the coals pass into high-grade 
suh-oituminous and true bituminous coals. These occur 
for the most part in relatively small and much scattered 
areas. In the valley region of the western part of the 
state the coals grade again into lignite, but unlike those 
of the eastern part, they are widely scattered and at pres- 
ent are not of economic importance. 

Lincoln County 

(Special Correspondence.) — J. J. Hibbard and P. S. Rose, 
who recently leased the Peterson-Bergstrom gold mine 
about 25 miles south of Libby, have received returns from 
a mill-test of the ore which they say is very satisfactory. 
The test showed that 90% of the contents could be saved. 
The ore vein carries on an average gold to about $20 per 
ton. It is the intention of the lessees to erect a starop- 
mill and concentrator on the property. 

Llbby. June 22. 

Missoula CotraTY 
The Iron Mask Mining Co. has 10 mining claims, two 
millsltes and two water rights, in the Spring Gulch dis- 
trict, near Keystone. Mining is mostly done by adits, and 
has been under way since the beginning of 1907. It is 
intended to erect a mill in the near future. 

Sllvebbow County 
(Special Correspondence.) — The new mill of the St. Louis 
Mining Co. has been placed in operation. It has a capacity 
of 200 tons per day, and, according to information given 
out, it is giving general satisfaction. It is being oper- 
ated by electricity, and those in charge say that this power 
is much more satisfactory than steam. The Butte-Alex 
Scott, during the year ended June 1, earned over $81,000 net 
as compared with $19,000 for the same period last year. 



Julv 5. 1<J13 



MINING AND SCIIiN 1 1FIC PRESS 



The mine 1* the best paying Independent |iro|M*r(y Id the 
district at the present time, nod as depth U being attained, 
the mine I* making a much better showing than ever be- 
fore. A. B. Wolvln. of the Butte * Duluth company, says 
that he will hare Ms enlarged leaching plant In oper- 
ation within the next two months, and at the present time 
he Is treating 100 tons of 4% copper ore per day, from 
which he Is receiving a return of 9s"< pure copper. Mr. 
Wolvln says that when the enlarged plant Is completed, he 
will handle BOO tons of ore per day. The force of miners 
has been Increased for the purpose of getting out a large 
supply of ore. According to reports given out by the. 
Davis-Daly people, the Colorado mine la fast becoming a 
producing property. The Hesperus orebody. cut on the 
H00-ft. level over eight weeks ago, was picked up a few 
days ago In No. 2 cross-cut. 125 ft. farther east than where 
the orebody originally was found. Development has dis- 
closed an orebody 14 ft. In width, nvernglng about 4% cop- 
per with some sliver. The Hesperus orebody has been 
proved for a distance of 325 ft.. 200 ft. of which, west 
from No. 1 cross-cut, shows a shoot, the average width 
of which Is 17 feet. 
Butte, June 28. 

During the first throe weeks of June, the Butte & Supe- 
rior mill averaged 650 tons of ore dally, with l'i sections 
in commission. The concentrate assayed 49% zinc, and re- 
covery was 89 per cent. 

The Belmont shaft at the Butti- is down 2400 ft., and 
connections have been made with other mines of the Ana- 
conda group. Underground wiring for electric traction 
Is underway. A 5000-ton ore-bin is being built and will 
be provided with modern applinnces for loading ore into 
cars for transport to the Washoe smelter. At the Butte 
& Zenith 500-ft. level cross-cut. a well defined vein has 
been cut. An electric pump has been Installed, and the 
electric hoist is ready for operation. 

NEVADA 

Clabk County 

(Special Correspondence.) — The Eldorado mining district, 
of this county, better known as the Eldorado Canon area, 
Is enjoying a revival of activity. From 25 to 30 years ago 
its surface ores produced several millions of dollars. The 
district was practically abandoned seven years ago. G. A. 
Duncan has been developing a large group of prospects, 
which he afterward purchased, and has been urging the 
importance of the district on others who were seeking 
mines. Four good mining companies are now pushing de- 
velopment work on as many different groups of claims, 
with good cause for encouragement. 

Nelson. June 27. 

ESStEBALDA COUNTY. 

On July 4 there will be drilling contests at Goldfleld. 
Prizes for double and single work will be $500 and $200, 
and $130 and $75, respectively, for first and second places. 
Eureka County 

(Special Correspondence.) — The work on the Buckhorn 
mill is going ahead at a good rate. The framework is 
up for the crushing plant, the tube-mill foundations are 
in, and the concrete work for the cyanide plant is about 
completed. The haulage adit has been connected with the 
mine workings, and about 15 miles of the poles for the 
transmission line are already up. The power plant is situ- 
ated at Beowawe, on the main line of the Southern Pacific, 
some 30 miles north of Buckhorn. 

Buckhorn, June 28. 

Humboldt County 

Sulphide ore has been opened at a depth of 200 ft. in 
the Big Four mine, Rochester. The vein is 9 ft. wide, 
averaging $35 per ton. Diamond-drilling will be done at 
the Seven Troughs Coalition mine. 

Lincoln County 

The Prince Consolidated is shipping 200 tons of ore per 
day. Tailing shipments from Bullionville to the Tooele 
smelter have been curtailed. It is stated that there is 
600 ft. of unprospected ground in Prince territory, between 
the south end of its workings and the Virginia-Louise 



property, which has proved Uw Prince Iron-ore deposits 
I.i rice ami viiluaM. In the older mine. 

MiNciAi. County 
Cinnabar has been opened near Mlna, and samples re- 
turn 6.5% mercury. The Goldfleld Consolidated Mines Co. 
has recently ordered from the General Klectrlc Co. a new 
6<>u-np. Induction motor. 

Nye Couhty 

l Special Correspondence.) — G. A. Duncan, of Nelson, 
Nevada, has sold his five patents pertaining to the treat- 
ment of slime In cynnlde mills. As the purchase was 
made by a consolidation of the milling companies uf 
Tonopah and Goldfleld, the active agent In the transaction 
being Albert Burch, manager of the Wlngfleld Interests, 
It Is possible that questions as to rights and royalties 
which were supposed to be settled by the court decision 
In the Moore-Butters case, may be reopened. In an article 
published In the Mininy and Scientific Preat on June 6, 
1908, the statement was made that Mr. Duncan was tho 
first to use and patent the internal water-pressure for 
tailing discharge, and the perforated-pipe filter-cell frame, 
which features displaced the Internal air-pressure for tail- 
ing discharge, and the wooden cell-frame, used by Mr. 
Moore. 

Tonopah, June 27. 

Stobey County 
Com8tock mining companies report the following during 
the week ended June 28: The pumps at the C. & C. shaft 
worked without trouble, and on the 2500-ft. level the north 
drift has been repaired a total of 865 ft. to date. The 
Ophlr 2500-ft. level raise produced 96 tons of $35.53 ore. 
The cyanide plant treated 549 tons of tailing, and bullion 
valued at $5400 was shipped. The Mexican mill treated 
657 tons of Mexican ore, averaging $47.70 per ton, with 
93% extraction. 

Washoe Couhty. 

(Special Correspondence.)— The Granite Hill copper 
mine, 14 miles northwest of Reno, operated by the Warner- 
Nelson Co., has shipped 51 tons of ore averaging 15% cop- 
per and $15 per ton in gold and silver. 

Reno, June 23. 

White Pine County 
Work to be undertaken by the newly formed Consoli- 
dated Copper Mines Co., at Ely, includes the following: 
Development to block out more ore in all the properties 
concerned; the remodeling of the Giroux mill at Kimberly 
for experimental purposes, especially as to the adaptation 
of the oil-flotation process to recovering the metals from 
low-grade ores; unwatering of the big Giroux shaft, and 
further development of the Alpha ore deposits, and, pos- 
sibly, the sinking of a deep working-shaft on the Chain- 
man group. 

OREGON 

Baker County 
A gold nugget weighing 80.4 oz. was found last week 
by Armstrong & Stuart at their placer claim, three miles 
from Galena. The district is fairly active. The diamond- 
drill in operation since spring, prospecting for dredging 
ground, was taken last week to the Granite district. 'The 
bench land near Sumpter has been drilled, and it is re- 
ported that another dredge will be erected there. The 
Sumpter dredge is having new lips fitted to the buckets, 
and is also operating the plant for about 12 hours per day. 

UTAH 

Juab County 

The report of the Beck Tunnel Consolidated Mining Co. 
lor the year ended June 1, 1913, gives the following infor- 



mation: 

Development feet 1,252 

Ore production, tons 6,419 

Gold content, ounces 7S5 

Silver, ounces 110,890 

Lead, pounds 1,880,706 

Value $72,488 

Total income 94,500 

Expenses 94,500 



30 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 



Salt Lake County 
The long tunnel of the Utah Metal Mining Co. was com- 
pleted on June 23, according to information from E. P. 
Jennings. This drive has been made through the moun- 
tains from the Middle canon side to the Bingham side of 
the range, and is 11,474 ft. in length. It took Z\< years 
to complete. With the single exception of the Ontario 
drain tunnel at Park City, which is 3% miles in length, 
this is the longest adit used for mining purposes in the 
state. 

WASHINGTON 

Ferbv County 

The Surprise mine produced 1160 tons of $12 to $20 ore 
during the first half of June. This comes from stopes 
on the 400, 500, and 700-ft. levels. The ore is sent to 
the Greenwood, British Columbia, smelter. 

Okanogan County 

(Special Correspondence.) — Engineers from the Trail 
and the British Columbia Copper Co.'s smelter, at Phoenix, 
British Columbia, have been examining the Copper World 
and Copper World Extension mines, on Palmer mountain. 

Republic, June 27. 

Stevens County 

A cross-cut in the Butte-Chewelah property, near Che 
welah, has cut a 20-ft. vein at a depth of 100 ft. About 
5 ft. of the shoot carries gray copper and some silver. A 
winze is to be sunk 300 feet. 

(Special Correspondence.)— The United Copper Co. is in- 
stalling four new batteries, of three stamps each, and will 
double the capacity of the mill. Holes have been dug, and 
the poles have been distributed for the transmission line 
from Myers Falls. 

Chewelah, June 26. 

CANADA 

Alberta 

(Special Correspondence.) — The Pelican Portage gasfleld 
and other localities in central Alberta are being examined 
for the City of Edmonton by L. G. Huntley, of the Asso- 
ciated Geological Engineers of Pittsburgh, Pennsylvania. 

Edmonton, June 23. 

British Columbia 

(Special Correspondence.) — Ore production for the third 
week In June in the Kootenai and Boundary districts 
is reported as being 47,212 tons, making a total for the 
year of 1,207,712 tons. One hundred thousand dollars will 
be spent by the British Columbia Copper Co. in the erec- 
tion of a concentrator at the Voight properties, near Prince- 
ton, according to a report from Greenwood. The action is 
prompted by results obtained from diamond-drilling and 
other investigations during the past two years. 

Spokane, June 27. 

The Granny company has acquired the claims of Moult, 
Hartley, and associates near Portland Canal. The ore 
opened will be used for fluxing. The British Columbia 
Copper Co. is employing 110 men on Copper mountain, near 
Princeton. Recently the Lucky Jim shipped from the 
Slocan 17 cars of zinc ore to the United States, upon which 
the duty amounted to $17,000, and may shut down until 
the tariff is lowered. The streak of high-grade ore in 
the Dynamo claim has widened to six inches. During the 
last six years Partman Bros, have expended $20,000 devel- 
oping this property. 

In the Flathead valley, at, the junction of Sage creek 
and the Flathead river, on the British Columbia side of 
the line, a company composed of Victoria and Vancouver 
capitalists is now engaged in drilling a well for oil. A 
contract has been given to California oil-well drillers to 
sink several holes to a depth of 2700 ft, and, if necessary, 
4000 ft. The first well is already down several hundred 
feet. During the past 100 years or more, Indians have 
skimmed oil from the seepages on the surface. 

KOREA 

(Special Corresponednce.) — During April, 240 stamps of 
the Oriental Consolidated Mining Co.'s mills worked 26 
days and treated 26,236 tons of ore, yielding $163,812. 



Operating costs were $85,280, development and improve- 
ments, $2815, leaving a profit of $75,716. The Kuk San 




TAPOWIE MILL OF ORIENTAL CONSOLIDATED COMPANY. 



Dong mill was shut down during the past month on ac- 
count of shortage of ore. 
New York, June 23. 

MEXICO 

Mexico 

During May the 40-stamp mill of the Mexico Mines of 
El Oro worked 30 days, treating 13,400 tons of ore yield- 
ing $138,530. The profit was $82,780. The 100-stamp mill 
of El Oro Mining & Railway Co. worked 30 days, treating 
23,830 tons of ore and 14,190 tons of tailing, yielding 
$227,360. The total profit was $92,950, including $5680 
from thr; railway. 

Sonoba 

(Special Correspondence.)— The Calumet & Sonora of 
Cananea Mining Co., whose property is about two miles 
northwest of Cananea, and which recently resumed oper- 
ations after being shut down for almost three months, is 
now working with practically a full force. One hundred 
and sixty men are now being employed. Before the shut- 
down but 60 were working. In fact, conditions are better 
at the property than they have been for some months, and 
the production is at the rate of 7000 tons of ore per month. 
Both the wet and dry mills are again working, two shifts 
being employed, and it may be only a short time before 
the mills are working 24 hours each. The ores being 
handled at present come from the 400 and 500-ft. levels. 
The new crusher and picking belt which were installed 
early in the year are giving good results. Fifty per cent 
of the material passing over the belts is thrown out as 
waste. W. H. Tangye, the superintendent, reports that 
development work is being done only on the 400-ft. level, 
where results are highly satisfactory. The managemenc 
states that, in the near future, operations will be conducted 
at full capacity, as a large orebody which was fouud 
shortly before the shut-down, three months ago, promises 
to furnish sufficient ore to run the plant for an indefinite 
time. An output of 40 tons per day, which will average 
$30, is figured. This gives a monthly earning of $36,000 
at an expense of $12,000. The company has shipped its 
concentrate which was stored awaiting the end of El 
Paso smelter's labor trouble. There were six cars whi"h 
netted $12,000. 

Cananea, June 28. 

TRANSVAAL 

A strike has broken out in the Rand district which 
threatens to tie up the entire gold-mining industry of 
South Africa. The dispute arose from a simple question 
about working hours in the new Kieinfontein mines, and 
from there gradually spread until the situation became so 
serious that troops were called out to protect property. 
The leaders of the unions have called a general strike, 
and the men have promised to respond. The closing also 
of some coal mines has aggravated the situation, and the 
railway employees threaten to come out. Meanwhile, the 
electricians appear inclined to shut down the power sta- 
tions, which have therefore been occupied by the military. 



July 5, 1913 MINING AND 

Schools and Societies 



TllK L'mvkjuity or WimoisiN held It* sixtieth coinmcnc- 
ment on June IS. Charles R. Vnn Him? delivering the 

address. 

Thr University or California, at Berkeley, opened Its 
summer school on June 13, with over 2000 students, and 
will coutlnue for about Ax weeks. 



A farty of seventeen students of mining from the Case 
School of Applied Science, Cleveland. Ohio, has been In- 
specting the mines and mills of the Coeur d'Alene. They 
are ulso doing some practical work. 

Tm Massachusetts 'Teen' held its commencement on 
June 10, and about "00 students received degrees, of which 
21 received the degree M.S.. and 269 the degree B.S. Chas. 
Ransom Hill presented a thesis, the title of which was 
•Cyanldntlon of Low-Grade Silver Ore from Utah.' 



The University or Illinois summer session opened on 
June 16. and will close August 16. Courses offered are 
arranged primarily for the needs of teachers, principals, 
anti superintendents. Many of the regular university In- 
structors will offer instruction during this special summer 
session. 



The University of Virginia, at Charlottesville, held its 
commencement exercises, finishing the eighty-eighth con- 
secutive session, during the week ended June 21. There 
were 116 graduates. A gift providing for 10 scholarships 
of $300, or 5 of $600, per annum, to be awarded to young 
Virginians was announced. 



Harvard University held its annual commencement start- 
ing June 14. Work Is practically finished on the new 
Coolldge laboratory for the department of chemistry. The 
new bulldlns. which will be in active use with the open- 
ing of college In the fall, Is a memorial to T. Jefferson 
Coolldge, '84, whose family subscribed $50,000 for Its con- 
struction. 



Announcement is made that the first work in which co- 
operation between the Massachusetts Institute of Tech- 
nology and Harvard University is to be effected has been 
outlined, and the confirmatory votes have been cast by the 
members of the two corporations. It is an arrangement 
whereby the students in public health, biology, and sanitary 
matters may have the benefits of corresponding courses. 



Columbla University will have about 4000 students at 
tending the six weeks' summer school which opens early 
in July. There are to be 243 instructors and 38 assistants. 
Students planning to spend the summer or the remainder 
of the year in Germany have been aided by a new depart- 
ment in the Deutsches Haus. It is called the Bureau of 
Academic Information, and is open daily, except Saturday, 
from 9 until 5 o'clock. It contains the announcements of 
the various German universities and scientific schools, as 
well as many bocks and pamphlets pertaining to higher 
education. Under the joint auspices of Columbia's Maison 
Franoaise and the Paris Sorbonne, a students' tour of 
France is also planned for the summer. 



Arrangements for the twenty-fourth general meeting of 
the American Electro-chemical Society, to be held at 
Denver, September 9 to 11, are progressing well. Offers 
of papers for the meeting have increased to twenty-one; 
four papers are already at hand, and one has been dis- 
tributed. Several more will be ready for distribution with 
the July Bulletin. Those having papers to present at this 
meeting should bear in mind that in order for them to 
be printed and distributed in advance of the meeting, the 
manuscript should reach the secretary not later than July 
15. If the title of the paper has not been sent in, it should 
be as soon as possible. Joseph W. Richards is secretary, at 
the Lehigh University, South Bethlehem, Pennsylvania. 



IF1C PRESS 31 

Personal 



I'rofasalonal man »ro Invliad to aand nawe of thslr «i|i|t> 
mante and trsvala. Such ntwi li Intaraatlns to rrlanda. 

J. W. FINCH Is In the BUt 
W. A. Mali, has gone to Europe. 
Tuomah F. Cole Is In New York. 
Joseph W. Richards Is In France. 
James Doiolas has gone to Europe. 
Barton Sewall has Balled for Europe. 
P. D. v.i ki i has gone to Seward, Alaska. 
F. G. Cottoell was In New York last week. 
H. F. Wierum Is expected in San Francisco. 
Thoman T. Read wan in Boston early in the week. 
F. C. Alsdobf Is visiting Cobalt and neighboring districts. 
A. B. Willard is president of the Republic Mines Cor- 
poration. 

Thomas Jay is superintendent at the Frisco mine, Mul- 
lan, Idaho. 

Herbert C. Enos Is now at Edlflcio La Mutua, No. 200. 
Mexico, D. F. 

Henby Bishop is superintendent at the Last Chance mine. 
Coeur d'Alene district. 

Harry J. Wolf has been examining a property In Cala- 
veras county, California. 

W. L. Anderson is local manager for the Mother Lode 
Sheep Creek Mining Company. 

C. F. Rand and Bradley Stodohton attended the reccDt 
meeting of the American Society for Testing Materials at 
Atlantic City. 

T. R. Woodbridoe, who has been visiting sampling works 
in the interest of the U. S. Bureau of Mines, was in San 
Francisco this week. 

J. A. Holmes and a party of engineers from the U. S. 
Bureau of Mines will sail from Seattle on the Admiral 
Sampson today to investigate the Matanuska coalfields. 

H. Foster Bain will leave for Denver and the East, 
Tuesday. He will attend the International Geological Con 
gress at Toronto in August as a representative of the Ameri- 
can Institute of Mining Engineers. 



Japanese Coal Situation 

The Imperial Government of Japan has placed an order 
for about 150,000 tons of Fushun coal for the railways for 
the current year. The aggregate annual consumption by 
the whole of the service is figured about 1,200,000 tons per 
year, and Fushun coal now comes In for the supply of one- 
eighth of the total consumption. The appearance of this 
coal on the field at home little disconcerts the suppliers of 
home coals. Such is stated to be the case by a good au- 
thority, who ascribes it to the rapid growth of Industrial 
enterprises all over Japan. The demand for coal is rising 
year by year, and the import of Fushun coal in consider- 
able quantities is no longer looked upon as a trespass upon 
the legitimate market for home coals. Two shafts have 
been sunk on Shimoputago Islet, Japan, the work marking 
an important development of the Takashima collieries, 
which are owned by the MItsu Bishl Co. It is estimated 
that 34,000 tons of coal will be obtained from the new 
shafts this year and that a monthly output of 30,000 tons 
will be possible when the preparatory work is complete. 
The colliery will be known at Futagoshlma. The coalfield 
tapped by the shafts is called Nakanoshima and contains, 
according to experts, 11,520,000 tons of coal. The yield is 
estimated to last 34 years. Another coalfield lies between 
Nakanoshima and Takashima and will be reached in the near 
future. Its area is far greater than the dimensions quoted 
above and 70 years is estimated as necessary to exhaust the 
reserves of both fields. The daily outputs of Takashima 
and Hashima mines, which up to now have supplied all the 
famous Takashima coal, are about 300 tons and 500 tons, 
respectively. 



32 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 



New York Metal Market Review 



Copper declined steadily in June, the concessions being 
made principally by second-hands; various influences both 
at home and abroad being held accountable, in addition to 
lack of demand. Lead, despite the absence of any really 
good demand, held up well, but the course of the metal in 
London and the consequent effect on the New York market 
was disappointing. Spelter was uniformly dull and declined 
steadily. Antimony was without any interesting feature 
beyond the continuance of low prices. The demand for tin 
was not heavy, prices declined, and London, always irregu- 
lar, was unusually erratic. Aluminum was lower at the 
end of the month and much affected by tariff possibilities. 
COPPER 

The Waterbury average for May was 15.87%c. The early 
days of June were almost completely devoid of demand, not 
even re-sale lots o£ electrolytic at around 15.25c. cash, New 
York, inducing consumers to enter the market. At no time 
was there much betterment. When the month opened, the 
large agencies were holding to their prices of 15.75c. cash, 
New York, for electrolytic and 15.87y 2 to 16c. for Lake, 
with the latter scarce for early delivery. At this time it 
was freely admitted that consuming mills were receiving 
fewer orders, though they were busy on those previously 
booked. In London the market weakened in the early days 
of June. About June 7 there were some sales of electrolytic 
by second-hands at 15.37>ic. cash, 30 days delivered, equal 
to 15.25c. cash, New York. London continued to decline. 
In the second week of the month there were additional 
sales of electrolytic, also by second-hands, who accepted sub- 
stantial concessions according to report. One of the large 
agencies did not deny on June 18 that its price abroad had 
been reduced to 15c. Many rumors were rife in the second 
week of the month, and the situation was rather unsettled 
in consequence. An added cause of uneasiness was a strike 
at the Laurel Hill, L. I., refinery of the Nichols Copper Co., 
which to some extent curtailed production. In the third 
quarter of June the quiet continued. Lake copper of a good 
grade, but not equal to prime Lake, was offered at 15c. cash, 
New York, but no takers came forward. For actual prime 
Lake, an offer of 14.75c. was made, but holders would not 
sell at this figure. In fact, practically no business was stir- 
ring, and producers saw no incentive for reducing their 
prices. Some re-sale lots were sold at 14.50c. cash, New 
York, but the quantities were not great. Four reasons were 
advanced for the quiet which prevailed: the fact that con- 
sumers were comfortably well supplied for their June 
needs, the falling off in new business, fears of tariff changes, 
and unsettled finances abroad. Toward the latter part of 
the month the American Brass Co. reduced the price of 
sheet copper and copper bottoms one cent, making the new 
base price for sheets 20c. and that for bottoms 26c. per 
pound. Near the end of June the price of electrolytic cop- 
per was weak at 14.50c, and that of Lake almost as weak 
at 15c. In Lake, especially, prices were largely nominal. 
Up to June 27 exports amounted to 23,858 tons. 

LEAD 

In the latter part of May there was a little flurry in lead, 
though no buying that might be called heavy. Early in 
June interest died out, but the metal remained firm at 
4.35c. New York and 4.20c. St. Louis. Approaching the 
middle of the month, an interesting situation developed 
because of the price advances* in London. The foreign 
quotation June 11 was £20 7s. 6d, equal to 4.36c. New York. 
It was foreseen that if the foreign price went up a few 
points more to cover freight to London, English buyers 
could come to the New York market. A week later, June 
18, the London price was £21, equal to 4.48c. New York. 
Subtracting 15c. per 100 lb. for freight left 4.33c, the price 
at which London could buy in New York. This was within 
two points of the New York price. The situation greatly 
strengthened the market, although New York quotations 
did not advance. Still another supporting influence was a 
fire which damaged the plant of the St. Joseph Lead Co., 
Herculaneum, Missouri, and which Interfered with deliver- 
ies by that Company. The situation resulted in 4.22%c. St. 



Louis being asked by some interests. Expectations of any 
large business from abroad were quashed when it developed 
that the high London price was the outcome of a corner 
not strong enough to stand. The foreign price declined and 
the incident was closed. Domestic consumers at the end of 
the month were buying only in a hand to mouth fashion. 

■ • SPELTER 
The market at the beginning of June was about 5.30 
New York and 5.15 St. Louis, vevy quiet and weak. It was 
reported that the demand of the galvanizers had fallen off. 
As the month progressed there were repeated declines, and 
the only demand that might be called even fair was for 
future metal. Toward the end of June the metal was 
quoted at around 5.16c. New York and 4.95 St. Louis and 
sellers were not inclined to press sales at these prices. It 
came to light that about 2000 lb. of spelter which had been 
smelted in bond from Mexican ore had been shipped to 
Europe. In the last few days of the month a little better 
demand developed and better buying was expected to soon 
materialize because of the fact that consumers had been 
out of the market so long that their stocks were lbw. 
ANTIMONY 

Throughout the month antimony was dull and without 
sufficient business to fully test prices. Hallett's was quoted 
at from 8.15 to 8.25c; Cookson's at from 8.60 to 8.70c; and 
Chinese and Hungarian grades at from 7.50 to 7.75c. 
TIN 

The month opened quietly following the heavy buying in 
the last days of May referred to in the last report. The 
buying in that movement was caused by heavy unloading 
by one London house. Early in June the price dropped to 
46.60c. New York, a decline of several points under what 
purchasers had paid a few days previously, and they 
naturally were much disappointed. On June 9 about 300 
tons was sold for delivery in various months, the spot 
price being 45.37% to 45.50c. At this time the supply was 
pretty well concentrated in a few hands. London had shown 
a persistent declining tendency. Toward the middle of 
.Tune the market was very dull, so much so that 100 tons 
of Banca tin was re-shipped to London. Straits tin is al- 
ways preferred in the New York market, though Banca is 
acceptable in times of shortage. The London market was 
very erratic in the third and last quarter of the month. 
June 17 London declined £3, which was attributed to finan- 
cial conditions abroad unfavorable to speculation and to 
the poor demand from this country. On June 18 the Lon- 
don price touched £203 5s. for spot, which up to that day 
was the low point of this year, but there was a rally after 
this low figure. In the last part of the month the market 
was very dull, and for much the same reasons as were men- 
tioned in the copper report. In London there was much 
liquidation, forced, it is understood, by the withdrawal of 
loans to Vienna operators by the bank which was financing 
them. The result was a decline of £12 in four days, which 
was followed by a recovery of £6 in two days. On June 23, 
spot tin was down to £193 in London. On June 27 the metal 
suffered another decline in London, falling £3 10s., the 
cause being reports from the United States that tin-plate 
mills might curtail consumption. These reports were not 
borne out by statements which followed here. The ten- 
dency throughout the month was a declining one, the month 
opening at 46.60c. and prices standing at 44.10c. on June 26. 
Arrivals up to June 27 totaled 3000 tons and there was 
afloat 875 tons. 

ALUMINUM 

In June aluminum declined by easy stages from 25- 
25.50 to 23.50-24. 50c. The most interesting feature of the 
month was the proposal of the United States Senate to fix 
the duty on aluminum ingots at a flat rate of 2c. per pound, 
instead of the duty of 25% ad valorem proposed by the 
Underwood bill as passed by the House of Representatives. 
The present rate on ingots is 7c. per pound. Authorities 
have pointed out that the cost of foreign aluminum is at 
present 18% to 19c. per pound c.i.f. New York, which, with 
a 2c. duty would make it 20% to 21c. per pound. This com- 
pares with the present price of 23.50 to 24.50c. to the dis- 
advantage of the American product, as can be seen. 



July 5, 1913 

The Metal Markets 



i in *i mi: r\i i-itH Ki 
San Francisco Is not a primary market for the common 
matala except quicksilver. Th« prlcaa quoted below there- 
fora rapraaant aalea of small lota and ara not auch aa an 
ore-producer could^ expect to raallae. Ore contracta usually 
call for eettlement on the baala of Eaatern prices, leaa 
freight and treatment charges. The prlcea quoted ara In 
centa per pound, except In the caaa of qulckallvar, which la 
quoted In dollars per flask of 76 pounds. 

Han Francisco, J uly 3. 

AnUmonjr : : : . | Qulckallvar (flaak) .141 

Ulcctrulyttc Copper la— tajc Tto__ 60— alio 

fig Lead „_..__„... MB— &.Ho I Spelter _ 7— 7Jo 

tine dual, law lb. casks, per Id) lb., email lou r 1 • 1 .■ : ■ . large 17 JO — fUGO 

KASTKKN Ill-Ill. M 1I1KET 

(By wire from New York.) 
NEW YORK. July 2. — Copper remains unchanged, though 
small lots have been sold at a slight conceaalon. In gen- 
eral, buyers are waiting, nml the Copper Producers' figures 
are anticipated with much Interest. Lead Is steady, the fire 
at Herculaneum having made no Impress on the market. 
Spelter la beginning to show the effect of curtailment of 
production, and prlcea aro firm, though no higher. 

MI.YKIl 

Below are given the average New 
centa per ounce, of fine allver. 
Date. 

June 26 S8.12 

" 17 68.12 

" 28 58.37 

■ Sunday 

•" 10 58.37 

July 1 58.12 

» 68.12 



MINING AND SCIENTIFIC PREiS 



;ci 



1912. 

Jan 58.25 

Feb 59.06 

Mch 58.37 

Apr. 69.20 

May 60.88 

June 61.29 



July 

Monthly averages. 
1913 



York quotations, In 

Average week ending 

May 21 60.66 

28 60.08 

4 69.99 

11 69.75 

18 68.08 

25 68.12 

2 68.20 



June 



63.01 
61.25 
67.87 
59.26 
60.21 
59.03 



1912. 

July 60.67 

Aug. 61.32 

Sept. 62.95 

Oct. 63.16 

Nov 62.73 

Dec 63.38 



LEAD 

Lead Is quoted In cents per pound or dollars per hundred 
pounds. New York delivery. 



Date. 



Date. 





. . . 4.33 


■Tune 


26 


. 4.33 




. . . 4.33 


27 


4.33 




. . . 4.33 




28 


. . . 4.33 


22 Sunday 






29 Sunday 




* 28 






30 


. . . 4.33 


" 24 


. . . 4.33 


July 


1 


. . 4.33 






2 





May 
June 



21. 
28. 
4. 
11 . 



Average week ending 
.4.33 June 18. 



1912. 

Jan 4.43 

Feb 4.03 

Mch 4.07 

Apr. 4.20 

May 4.20 

June 4.40 



4.33 

4.33 

4.33 

Monthly averages. 
1913. 

4.23 

4.33 

4.32 

4.36 

4.34 

4.33 



July 



July 
Aug. 

Sept. 
Oct. 
Nov. 
Dec. 



.4.33 
.4.33 
.4.33 



1912. 

. 4.71 

. 4.64 

. 6.00 

. 5.08 

. 4.91 

. 4.20 



ZINC 

Zinc la quoted as spelter, standard Western brands, 
Louis delivery. In cents per pound. 



St. 



Date. 



Date. 







June 


26 


5.03 


" 20 






. . . 5.05 








28 


. . . 6.05 


22 Sunday 






29 Sunday 










30 


5.08 






July 


1 


. . . 6.10 


" 25 


. . . 5.00 


2 


. . . 5.10 



Average week ending 



May 



Jan. 
Feb. 
Mch. 
Apr. 
May 
June 



21. 
28. 

4. 
11. 



June 18 



July 



1912. 
. 6.42 
. 6.50 
. 6.67 
. 6.63 
. 6.68 



5.28 

5.19 

5.11 

4.94 

Monthly averages. 
1913. 



.4.90 
.4.97 
.5.07 



6.13 
6.94 
5.52 
5.23 
6.00 



1912. 

July 7.12 

Aug 6.96 

Sept 7.46 

Oct 7.36 

Nov 7.23 

Dec 7.09 



I* Vogvlaleln. In n trade letter dated June 27, points out 
that consumption of spelter has, aa yet, been but little re- 
duced. It la the decrease In future orders for Iron, steel, 
and brass goods that makea buyera nervoua and which has 
affected prlcea. The Senata proposes to raise the tariff from 
10 to 11%, and on oros from It to 11 H*. Assuming that 
spelter abroad goes aa low as 110. and that the Senate rates 
ainud. 6.16o. would be the lowest New York price for Im- 
ported spelter, and this wnuld constitute no menace to Amer- 
ican producers. It is well known that there haa been In- 
sufficient spread between prlcea of ore and metal, und that 
new works have been building. Preaont conditions dlscour- 
age the builders from firing up. and mines aro closing. It 
Is worth remembering, however, that the present llnanulul 
storm has been foreseen and largely discounted. While, 
therefore, lmmedlute prices may be low, It may be but a 
short time before good conditions return. 

COPPEIl 

Quotations on copper as published In this column rep- 
resent average wholesale tranaactlona on the New York 
market and refer to electrolytic copper. Lake copper com* 
manda normally from 1-6 to l-4c. per lb. more. Prices are 
in cents per pound. 

Date. 







June 


26 


14.43 


•' 20 


14.60 


27 


. .14.48 


■• 21 


14.60 




28 


. . . .14.42 


11 Sunday 






29 Sunday 




" 28 


14.40 








" 24 


14.43 


July 


1 


14.43 






2 





Average week ending 



21 15.60 

28 16.48 

4 16.18 

11 14.79 



June 18 14.70 

26 14.47 

July 2 14.43 



Monthly averages. 



1912. 1913. 

Jan 14.09 16.54 

Feb 14.08 14.93 

Mch 14.68 14.72 

Apr. 15.74 16.22 

May 16.03 15.42 

June 17.23 14.71 



1912. 

July 17.19 

Aug. 17.49 

Sept 17.66 

Oct 17.82 

Nov 17.31 

Dec 17.87 



COPPEB SUEPLUS 

Figures showing the visible supply of copper at the be- 
ginning of each month are now widely available. Below 
are given the amounts. In pounds, known to be available at 
the first of each of certain months. The figures are those 
of the Copper Producers' Association supplemented by Mer- 
ton's figures of foreign surplus. 

TJ. S. European. 

July 1912 44,335,004 107,817,920 

August " 60,281,280 113,285,760 

September " 46,701,376 112,743,680 

October " 63,065,687 107,396,800 

November " 76,744,967 103,803.840 

December- " 86,164,059 96,949,440 

January 1913 105.311,360 96,859,840 

February " 123,198,362 100,067,520 

March " 122,302,198 95,542,720 

April " 104,269,270 106,565,760 

May " 76,549,108 102,664,720 

June " 67,474,226 93,378,880 

July " 86,666,760 

United States Phoduction and Consumption 
Domestic 

Production. deliveries. Exports. 

May 1912 126,737.836 72,702,237 69,486,945 

June " 122,315,240 66,146,229 61,449,650 

July " 137,161,920 71,093,120 60,121,600 

August " 145,628,521 78,722,418 70.485,150 

September " 140,089,819 63,460.810 60,264,796 

October " 145,405,453 84,104,734 47,621,342 

November " 134,695,440 69,369,795 55.906.550 

December " 143,353,280 68,490,880 65,712,640 

January 1913 143,479,626 65,210,030 60.383,845 

February " 130.948.881 59.676.402 72,168.623 

March " 136,251,849 76,685.471 77,699,306 

April " 136,333,402 78,158,837 85,894,727 

May " 141.319,416 81,168,800 68,286,007 

The fortnightly statistics of copper show that the Euro- 
pean stocks, including Hamburg and Rotterdam, on June 
30 decreased 1727 tons, while copper supplies afloat de- 
creased 50 tons, making a total decrease in the visible sup- 
ply of 1777 tons to 38,199 tons, as compared -with 39, 976, tons 
on June 14 last. 

QUICKSILVER 

The primary market for quicksilver Is San Francisco, Cali- 
fornia, being the largest producer. The price Is fixed In the 
open market, and, as quoted weekly in this column, Is that 
at which moderate quantities are sold. Buyers by the car- 
load can usually obtain a slight reduction, and those want- 
ing but a flask or two must expect to pay a slightly higher 



34 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 



price. Average weekly and monthly quotations, in dollars 
per flask of 76 lb., are ffiven below: 



Week ending: 

6 

12 



.41 

.41 



July 



19. 
26. 
3. 



.41 
.41 
.41 



Monthly averages. 





1912. 


1913. 








39.37 


July 


Feb 




41.00 


Aug. 


Mch. 




40.20 


Sept. 




42.25 


41.00 


Oct. 


May 


41.76 


40.25 


Nov. 




41.30 


41.00 


Dec. 



TIN 

New York prices control in the American market for tin, 
since the metal Is almost entirely Imported. San Francisco 
quotations average about 5c. per lb. higher. Below are given 
average monthly New York quotations. In cents per pound: 
Monthly averages. 



1912. 1913. 

Jan 42.53 50.45 

Feb 42.96 49.07 

Mch 42.58 46.95 

Apr 43.92 49.00 

May 46.05 49.10 

June 46.76 45.10 



1912. 

July 44.25 

Aug. 45.80 

Sept. 48.64 

Oct 50.01 

Nov 49.92 

Dec 49.80 



1913. 



LONDON QUOTATIONS 

(By cable, through the courtesy of Catlin & Powell Co., 
New York.) 



July 3. 

E 8. d. 



July 

e s. 



Alaska Mexican 1 17 

Alaska Treadwell 7 17 

Alaska United^ S 17 

Arizona t 17 

California Amalg 2 

California Oilfields 4 

Camp Bird 15 

El Oro IS 

Esperanza 17 

Granville 7 



Kern River Oilfields 

Mexico Mines... 5 

Messina _ 1 

Orovllle ..." 

2 6 Pacific Oilfields I 

Rio Tlnto 71 

16 Santa Oertrudls 

16 Stratum's 

17 6 Tanganyika 2 

7 6 I Tomboy _ 1 

AUSTRALIAN 







July 3. 




July 


3. 




£ 


s. d. 




£ 


s. 


1. 


British Broken Hill 


2 










12 


B 


Broken Kill Props 




16 


Mount Elliott 


4 


10 







2 


12 6 







16 

6 





Great Boulder Props 





13 9 




3 


3 


Ivanhoe. 


2 


6 


Walhl 


2 


2 


6 


Kalgurll 


2 










17 


6 



Dividends 



The Stock Markets 



NEVADA STOCKS 

(By courtesy of San Francisco Stock Exchange.) 
San Francisco, July 2. 



Atlanta .1 .16 

Belmont 6X6 

Big Four. .42 

Buckhom 1.30 

Con. Virginia .06 

Florence „ .33 

GoldfleldCon 1.70 

Goldtleld Oro 10 

Halifax 1.45 

Jim Butler .71 

Jumbo Extension 11 

MacNamara 17 

Mexican .70 

Midway 43 



Mlzpah Extension 8 JiO 

Montana-Tonopah 1.00 

Nevada Hills 93 

North Star_ .87 

Ophlr 18 

Pittsburg Sliver Peak 46 

Round Mountain _ 47 

Sierra Nevada 12 

Tonopah Extension 2.07 

Tonopah Merger 61 

Tonopah of Nevada 6.60 

Union 08 

West End 1.35 

Yellow Jacket. 19 



COPPER SHARES — BOSTON 

(By courtesy of J. C. Wilson, Mills Building.) 







July 3. 






July 3. 




Bid 


Ask 




Bid 


Ask 


Adventure 


8 U 


1« 

32 


Mohawk 


8 431 


44 


Allouez 


31 


North Butte 


24J 


25 


Calumet & Arizona. 


. 69| 


69] 


Old Dominion. 


44 


46 


calumet 4 Hecla .. 


415 


420 


Osceola 


76 


78 


Centennial 


10 


11 


Qulncy 


68 


60 




39» 
10 


40 






7i 

2 


East Butte 


10) 
S( 

56» 
6 


Superior & Boston 


.. 11 


Franklin 


6 




. 231 


24J 

351 
9* 
U 


Gran by 


66 


U. 8. Smelting 


.. 36J 


Greene Cananea 


. 61 


Utah Con 


9 


Hancock 


l&i 


161 
191 

Si 


Victoria _ 


- 11 


Isle-Royale 


19 


Winona 


■• 11 


li 
80 


Mass Copper 


. 21 


Wolverine ."„. 


60 



NEW 

(By courtesy of E. 



YORK QUOTATIONS 

F. Hutton & Co., Kohl Building.) 
July 3. 





Bid. 


Ask. 




Bid. 


Ask. 


Alaska Mexican. 


8% 


8% 


Mason Valley . . 


. 5% 


6 


Alaska Tread. . . 


36% 


38% 


McKlnley-Dar. 


. 1% 


1% 


Alaska United.. 


17% 


18% 


Miami 6s 


.168 


173 


Alaska G. M 


15% 


15% 


Mines Co. Am. 


• 2% 


2% 


Braden Copper. . 
B. C. Copper 


6% 
2% 


6% 
2% 


Ohio Copper... 


. 8% 
% 


8% 
% 




1% 

2 


2% 
4 




. 18 


20 
4 






2 




1 


z # 


S. W. Miami. . . 


5 


7 


Ely Con 


8 


10 


So. Utah 


% 


% 

172 

% 




1* 
1* 


. 2 


S. O. Calif, . 


.170 




1% 


Trl Bullion . . . 


% 




6% 


«% 

17 




. 1% 


1% 
% 


Hollinger 


16 


United Copper. 






3% 
2% 


8% 

2% 




. 11 


13 
2% 




Yukon Gold... 


• 2% 



Coppeb pboduction of the Utah Copper and Nevada Con- 
solidated companies In May was 9,834,894, and 5,933,275 lb v 
respectively. 



Coppeb concentrate produced by the Elmore process at 
the Sulitjelma mines, Norway, in May, amounted to 850 
tons. 



The Shattuck-Arizona Copper Co. has declared a dividend 
of 50c. per share, making $4 to date. During 1912 no pay- 
ments were made. 

The Ahmeek Mining Co. has declared a quarterly divid- 
end of $5 per share, as against $7 paid in the two pre- 
vious distributions. 

The Bunker Hill & Sullivan Mining & Concentrating Co., 
on July 3, paid dividend No. 190, amounting to $65,400. 
This makes a total to date of $14,369,550. 

The Federal Mining & Smelting Co. will pay a dividend 
of 75c. per share, on July 15, on the common stock. This 
is the first payment on this stock since January 1909. On 
the same date, the preferred stock will be paid 87 He per 
share, the second during 1913. Total dividends declared 
to date amount to $10,399,750. 

The Consolidated Mining & Smelting Co., operating a 
smelter and a number of mining properties in British Co- 
lumbia, paid a semi-annual dividend of $220,000, on July 5. 
The disbursement is based on a rate of 8% per year on the 
issued capitalization, and will bring the total payments of 
the company to $1,234,061. 

In July a total of $263,419,305 will be paid to investors 
representing dividend and interest disbursements by rail- 
road, industrial, and traction corporations, banks and trust 
companies, the national government, and New York City. 
This compares with $253,267,992 last year. This month 
the sum of $95,885,055 will be paid to stockholders in the 
way of dividends, or an increase of $3,430,263. 



The Abangarez Gold Fields Co. of Costa Rica reports the 
following results of operations at its mines: 

Four Four 

April, months months 

1913. of 1913. of 1912. 

Ore crushed, tons 5,221 17,353 15,116 

Tailing leached, tons 482 1,662 2,104 

Slime treated, tons 4,468 14,462 11,101 

Extraction by amalgamation $13,680 $39,781 $65,928 

Extraction by cyanide 30,956 113,843 67,520 

Total $44,636 $153,625 $133,449 

Less cost of operation, market- 
ing and administration (ex- 
clusive of betterments) 44,071 184,829 260,747 



Profit from operations $565 

Betterment expenditures. 18,187 

•Deficit. 



•$31,203 '$127,298 
36,339 115,436 



London advices report that the Pato dredge of Oroville 
Dredging Co., Ltd., recovered $1550 from 11,200 Co. yd. in 
the week that ended on May 27, and $2560 from 21,400 cu. 
yd. in the week that ended on June 3. 



.IhI* I'M ; MINING AND SCIENTIFIC PRESS 



Current Prices for Ores and Minerals 



(Corrected monthly by Atkins. Kroll * Co.) 
The price* are approximate, subject to fluctuation, and to 



variation according to quantity, quality, and delivery re- 
quired. They are quoted, except aa noted, f.o.b. San Fran- 
claco. Buying prloea marked *. 

Min Max. 

Antimony ore, 804. y ton _ •f.2.00 826.00 

Araenlc. white, reflned, v> lb „ 0.04 0.041 

Arsenic, red, refined, y lb 0.08 0.0*4 

Asbestos, according to length and quality of (lore 

ft loo _ ._ _ 100.00 HO.00 

Asbestos, lower grades, y ton _ _ 6,00 (0.00 

Asphaltum. reflned. y ton - . .... 10,00 to. 00 

Barium carbonate, precipitated, II ton _ 42.50 45.00 

Barium chloride, commercial, y ton „ _ 42.60 46.00 

Barium sulphate (barytea). prepared, y ton 20.00 30.00 

Bismuth ore. 104 upward. y ton _. »76.00 upward 

Chrome ore, according to quality, y ton _ m 10.00 12.60 

China clay. Kngllah. levigated, y ton 16.00 20.00 

Cobalt mrtal. reflned, f . o. b. London, ft lb 2.60 

Coke, foundry, y 22401b 11.60 15.00 

Diamonds: 

Balls* according to site and quality, ft cnrat 70.00 

Borts, according to slse and quality, y carat .._ 2.00 15.00 

Carbons, according to slie and quality, y carat _ 66.00 90.00 

Feldspar, ft ton _ (.00 26.00 

Firebrick: 

Bauxite, y M _ 175.00 

Magnetite. y M 190.00 275.00 

Silica, ft M. 42.60 65.00 

Flint pebbles for tube-mills, y 2240 lb 19.50 22.60 

Fluorspar, y ton. 10.00 15.00 

Fullers earth, according to quality, y ton _ _ 20.00 30.00 

Ollsonlte, y ton 38.00 40.00 

Graphite: 

Amorphous, y lb. 0.011 0.021 

Crystalline, y lb_ 0.04 0.18 

Qypsum. y ton ._ 7.60 10.00 

Infusorial earth, y ton _ 10,00 16.00 

Magnetite, crude, y ton _ 6.00 7.60 

Magnetite, dead calcined, y ton _ 20.00 26.00 

Magnetite, brick (see firebrick). 

Manganese ore. oxide, crude, -• ton 10.00 25.00 

Mangnnese, prepared, according to quality, ft ton _ 30.00 70.00 

Mica, according to site and quality, y lb 0.05 0.30 

Molybdenite, 964 MoS„ y ton 400.00 460.00 

Monazlto sand (54thorla). y ton 160.00 200.00 

Nickel metal, refined, y lb _ _ 0.45 0.60 

Ochre, extra strength, levigated, ft 100 lb 2.25 3.25 

Platinum, native, crude, y ox _ _ 30.00 45.00 

Sllex lining for tube-mills ft 2240 lb 32.60 35.00 

sulphur, crude, y ton _ 20.00 25.00 

Sulphur, powdered, y ton 35.00 46.00 

Sulphur. 804, ? ton 16.50 18.60 

Talc, prepared, according to quality, ft ton _ 20.00 60.00 

Tin ore, 604, y ton 650.00 600.00 

Tungsten ore, 664 426.00 460.00 

Cranium ore, 104 mln. 25.00 per unit 

Vanadium ore, 164 V a O a , y ton _ 160.00 180.00 

Wolframite (see tungsten ore). 

Zinc ore,.50 4 up,y ton «15.00 20.00 



Current Prices for Chemicals 



(Corrected monthly by Braun-Knecht-Helmann Co.) 
Prices quoted are for ordinary quantities In packages as 
specified. For round lots lower prices may be expected, 
while In smaller quantities advanced prices are ordinarily 
charged. Prices named are subject to fluctuation. Other 
conditions govern Mexican and foreign business. 



Mln. Max. 

Acid, sulphuric, com'l, 66°, drums, ft 100 lb 80.76 81.00 

Acid, sulphuric, com'l, 66°, carboy, ft 100 lb 1.00 1.50 

Acid, sulphuric, C. P., 9-lb. bottle, bbl., ft lb 0.13 0.18 

Acid, sulphuric, C. P., bulk, carboy, ft lb 0.091 0.12 

Acid, muriatic, com'l, carboy, ft 100 lb 1.60 3.00 

Acid, muriatic. C. P., 6-lb. bottle, bbl., ft lb 0.15 0.20 

Acid, muriatic. C. P., bulk, carboy, ft lb O.lOi 0.15 

Acid, nitric, com'l, carboy, ft 100 lb 6.00 6.50 

Acid, nitric, C. P.. 7-lb. bottle, bbl., II lb 0.16 0.22 

Acid, nitric, C. P., bulk, carboy, ft lb.* 0.121 0.15 

Argols, ground, bbl., y lb 0.10 0.20 

Borax, cryst. and cone, bass, y 100 lb 3.00 4.35 

Borax, powdered, bbl., ft 100 lb 3.38 4.50 

Borax glass, gd. 30 mesh, cases, tin lined, ft 100 lb 10.50 13.50 

Bone ash, 60 to 80 mesh, bbl., y 100 lb 6.60 6.50 

Bromine, 1-lb. bottle, y lb 0.55 0.65 

Candles, adamantine, 14 oz., 40 sets, ft case. 4.60 4.80 

Candles, adamantine, 14 oz., 60 sets, y case 5.25 5.46 

Candles, Stearic, 14 oz., 40 sets, ft case 5.00 5.20 

Candles, Stearic, 14 oz., 60 sets, ft case _ 6.70 5.90 



♦Extra charge for packing nitric acid for shipment to conform 
to regulations. 



SB 

Clay, domestic lire, tack, y 100 lb „ „.„... MO too 



Cyanide, M to 1004, 100-lb. rate, 9 lb „ o.tvf 0.M| 

Cyanide, at to 1004, 200- lb. case, y lb _ o.jo 0.14 

Cyanide, Its*, 100-th. csae, y lb _ o.t7| 0.214 

Cyanide, 1894. 300-1 b. esse, y lb 0.381, at7» 

Lca.1 acetate, brown, broken casks, y 100 lb ..... v.00 10.60 

Lead acetate, whlto, broken casks, y 100 lb I0JW 10.76 

Lead acetate, whits, crystals, y 100 lb 12.60 13.16 

Load. c. P., lest., gran,, y 100 lb _ 18,00 16.00 

Lead. C. P., sheet, y 100 lb .16.00 18.00 

Litharge, C. P., silver free, y 100 lb 11.50 19.60 

Litharge, com'l, y 100 lb „ g.00 B.60 

Mauicaneaeox., blk., dom! In bags, y ton .20.00 26.00 

Manganese ox., blk., Cauraslan, In caaks, y ton 80.00 47.60 

(864 Mno,— J4 Fe) 

Nitre, double refd, small cryst.. bbl., y 100 lb 7.00 8.00 

Nitre, doublo rord, granular, bbl., y 100 lb 8.60 7.60 

Nitre, double rerd, powdered, bbl., y 100 lb 7.26 8.00 

Potassium bicarbonate, cryst., y 100 lb 12.00 15.00 

Potassium carbonate, calcined, y 100 lb 7.60 9.00 

Potassium permanganate, drum, y lb 0.101, 0.13 

Silica, powdered, bags, ft lb. 0.03 0.06 

Soda, carbonate (ash), bbl., y 100 lb „ 1.50 1.76 

Soda, bicarbonate, bbl., ft 100 lb 2.25 2.76 

Soda, caustic, ground, 984, bbl., y 100 lb 3.16 8.60 

Soda, caustic, BOlId, 984, drums, y 100 lb 2.65 2.86 

Zinc shavings, 860 line, bbl., y 100 lb 10.66 12.00 1 

Zinc sheet, No. 9—18 by 84. drum, y 100 lb 8.76 10.00 



Joplin Ore Market 



At (he beginning of July, zinc sulphide ores brought $39 
lo $43 per ton, assay basis of 60% metallic zinc, and spelter 
at East St. Louis was quoted at $5 per cwt. These figures 
compared with those of the corresponding period of 1912 
are discouraging, but conditions throughout the district 
nevertheless are fairly good. At this time a year ago zinc 
sulphide ores brought $54 to $58, basis, with better grades 
selling for $61, and spelter brought $7. Shipments are less 
than 5000 tons per week, and the output is possibly a few 
hundred tons in excess of this, as a number of operators 
are holding for better prices. This indicates a gradual in- 
crease in the surplus reserves, which are now about 4500 
tons. Calamine brings $20 to $21 per ton, assay basis 40'/, 
metallic zinc. Lead ore is unchanged at $52.50 per ton, 
80% metallic lead. 



Coal Mining in China and Japan 



There is a colliery at Huashihling, northeast of Chang- 
chun, with a coal seam said to 15 ft. thick. At present 
about 13 tons is produced daily. With the use of modern 
machinery the daily output will easily be considerably in- 
creased. The Chinese tax collector at Changchun resigned 
his office recently to assume management of the colliery. 
He has paid about $37,500 to the concessionaire as the price 
of the property and is said to have a similar amount to 
invest in the mine. Recent coal production of the Kailan 
mining administration's mines was as follows: 

Output, Sales, 

tons. tons. 

Week ended March 22 28,656 44.685 

Week ended March 29 39,686 40,352 

Week ended April 5 39,932 ' 40,404 

Week ended April 12 36,101 50,597 



Norway's ore production in 1912 was as follows: pyrite, 
43,000 tons; iron, Norway and Sweden, 400,000 and 2,800,- 
000 tons respectively; and nickel ore, about 250,000 tons. 
The Sultijelma copper mine produced 149,600 tons of ore, 
yielding 11,500 tons concentrate by the Elmore process. 
There are 11 Elmore machines in operation. A Wedge 
roasting furnace was installed to deal with the Elmore con- 
centrate. The Sydvarangar Iron Ore Co. will soon be in a 
position to produce 650,000 tons per annum. The Evje 
nickel mine produced 240,000 tons of ore, and the refinery 
produced 400 tons of nickel and 200 tons of copper. 



Pig-irox production of Germany during 1912 was 17,852,- 
571 metric tons. 



36 



MINING AND SCIENTIFIC PRESS 



July 5. 1913 



Recent Metallurgical Patents on the Rand 



REGULATING UNDERFLOW FROM COKE SAND CLASSIFIES 

The application of Charles William Dowsett Is for the 
purpose of providing automatic means for regulating the 
underflow from cone sand classifiers. An outlet valve at 
the underflow aperture is made to open when the frictional 
engagement of the moving sand overbalances a weighted 
level which again comes Into operation to close such valve 
when the sand Is below a predetermined level so that the 
vertical surface supplied for the frictional engagement pre- 
sents a smaller area of contact. 

Regulatino Underflow of Classifying Cokes 

The application of William Arthur Caldecott refers to 
the means for regulating automatically the underflow of a 
classifying cone or similar apparatus, the main part con- 
sisting of a buoyant body or float which actuates a valve or 
equivalent device placed at or near the outlet of the cone, 
the said body of float falling or rising according to the depth 
of settled solids Increases or decreases inside the cone and 
thus automatically opening or closing the outlet. This ap- 
paratus is used in combination or otherwise with the dia- 
phragm forming the subject matter of patent No. 231 of 
1908. 

Tube-Mill Dischaboe 
The application of William Calder has reference to the 
discharge of ground pulp from tube-mills and consists of a 
perforated plate through which the pulp enters a lift cham- 
ber having means, such as radial arms, to elevate the pulp 
and discharge It Into the discharge trunnion of the mill. 
Its usefulness lies In the free and rapid discharge of com- 
minuted ore from the mill, giving the effect of a peri- 
pheral discharge. 

Barytes Production, 1912 



The production of crude barytes In the United States in 
1912, according to figures compiled by J. M. Hill, of the 
United States Geological Survey, was 37,478 short tons, 
valued at $153,313. Compared with the production of the 
preceding year this was a decrease of 967 tons in quantity, 
but an increase of $30,521 in value, the average price per 
ton reported to the Survey in 1912 being $4.09, compared 
with $3.19 for 1911. At the close of 1912 there were 6262 
short tons of crude barytes unsold at the mines. There 
was also 29,865 tons of barytes Imported, having a value of 
$79,315. and $376,017 worth of barium salts, including arti- 
ficial barium carbonate and blanc fixe. 

The greater part of the barytes produced in the United 
States is used as a pigment in the manufacture of mixed 
paints. It is also used in the manufacture of lithopone, a 
white pigment. Other uses for the mineral are in the manu- 
facture of rubber, wall paper, asbestos cement, and poker 
chips, and in tanning leather. A use of barytes reported 
from Italy is in the manufacture of gorgonzoia cheese. The 
cheese receives a covering in the form of a thick heavy 
crust of the finely ground material which has the property 
of affording just sufficient protection from aeration. 



Chilean Sale of Nitrate Lands 



A decree has been issued fixing November 17, 1913, as the 
date of the next public sale by auction of nitrate lands 
belonging to the Government. The lands to be sold are 
known as the Santa Laura de»Wendel property, and it is 
estimated to contain 15,000,000 metric quintals of nitrate 
(metric quintal. 220.46 lb.). It is situated in the province 
of Tarapaca. The Government reserves the right to divide 
the property Into two lots if desired. The sale will be held 
before the Junta de Almoneda in Santiago under the usual 
terms and conditions. — Consular Report. 



St. Johx Del Rev mine. Brazil, produced gold valued at 
$153,000 from about 14,000 tons in May. 

Potash production of German mines during 1912 was 
4.736,105 tone. 



Decisions Relating to Mining 

Specially reported for the Mining and Scientific Press. 



Oil Lease — Treateo as an Option 
An oil and gas lease was held to be a unilateral contract 
which did not bind the lessor unless certain conditions were 
performed b$ the lessee. If the lessee failed to perform 
such conditions within the time prescribed, then the lease 
was to be treated as a forfeited option and the lessor re- 
leased from all obligations thereunder. 

Wltherspoon v. Staley (Texas), 156 Southwestern, 557. 
March 12. 1913. 



Oil Placers — Injunction Denied 
In an action to determine the ownership and right to 
possession of certain mining claims, a complaint alleging 
the hauling of lumber on the claim and the erection of a 
rig by defendants for the purpose of boring for oil failed 
to show Irreparable injury such as would justify the issu- 
ance of a temporary injunction, where it did not show that 
defendants were extracting, or threatening to extract, oil 
from the ground. 

Martin v. Dunzlger (California), 132 Pacific, 284. 
March 25, 1913. 

Miner's Lien — Alaska Statute Construed 
Section 262, Civil Code of Alaska, giving a lien to per- 
sons performing labor on the construction, development, 
alteration, or repair of any building, flume, mine, tunnel, 
aqueduct, or other structure, limits the lien to work done 
in the development or improvement of a mine; and hence 
did not confer a Hen for sluicing up the dump or for 
extracting gold therefrom, which was the ordinary, work 
of a mluer in the operation of a placer claim, having 
no relation to the development or improvement of the 
mine. 

Noble t>. Gustafson (Alaska), 204 Federal, 69. March 
3, 1913. 



Coal Lease — Construction 
Where the lessor of a coal mine, through mere oversight 
on the part of its employees and not from a consideration 
or interpretation of a mining lease, failed to demand an 
excess royalty to which it was entitled, this did not amount 
to a contemporaneous interpretation by the parties of a 
royalty clause in the lease. Such a clause will only be con- 
strued in light of the whole contract, and should be given 
such a construction as will not result in giving one party 
an unfair or unreasonable advantage over the other, though 
such construction violates the rules of punctuation and 
grammar. 

Hillside Coal & Iron Co. v. Sterrick Creek Coal Co. 
(Pennsylvania), 86 Atlantic, 865. February 24. 1913. 

Minino Co-tenants — Accounting 
Two mining companies were equal owners and tenants 
In common of certain mining properties. One of them 
secretly worked the properties, extracted a large quantity 
of ore and appropriated the proceeds therefrom without 
accounting to its co-tenant. Subsequently it sold its in- 
terest to another company, part of the consideration Jjeing 
that the grantee should assume the debts and obligations 
of the grantor. In a suit by the defrauded co-tenant 
against the grantee for an accounting and damages, it was 
held (1) that the grantee could be sued directly for an 
accounting by reason of its outstanding contract to pay th-j 
grantor's obligations: (2) that the measure of damages 
should be the value of ore taken less the cost of mining 
the same. The usual rule fixing the gross value of the 
ore as the measure of damages against a trespasser who 
wilfully &nd unlawfully converts another's ore to his own 
use does not apply to co-tenants because the taking in 
the latter case is lawful, although it may have been done 
with bad intent. It is the refusal to account and divide 
the proceeds which gives rise to the cause of action. 

Silver King C. M. Co. v. Silver King C M. Co., 204 
Federal (Utah). 166. April 5, 1913. 



July Ill 13 



MINING AND SCIENTIFIC PRESS 



Company Reports 

MclNTYRE-POKCUPINE MINES, LTD. 

This Company operates a gold mine at Porcupine. On- 
tario, and the report cover* the work of the second year. 
The property covers about 148 acre*, the largest portion of 
which Is under Pearl and Gillies lakes. The available ore 
reserves are contained In not over 10 acres, which will sup- 
ply enouith ore for several years. Tho two largest velna 
discovered were cut by a diamond-drill under Pearl lake. 
The rocks outcropping on the Mclntyre may be roughly 




MAP OF M'lNTYRE-PORCl'PINE PROPERTY. 



divided Into three kinds: (1) a dark fine-grained basic- 
schistose rock which has been called 'basaltic' schist, and 
which, on close microscopic examination, appears to be an 
altered and recrystallized diabase; (2) a crystalline pearl- 
gray acid-schistose rock, showing distinct and plentiful 
quartz phenocrysts which has been called 'quartz porphyry'; 
and (3) a massive igneous rock which has been called a 
diabase, and which intrudes the basaltic schist on the north 
boundary either as a stock or laccolith. Broadly speaking, 
there are two bands of this basaltic schist enclosing a body 
of quartz porphyry; one band on the south and the other 
on the north of Pearl lake. The lake bottom itself is be- 
lieved to be lying in the porphyry. 

No. 1 and 4 shafts are down 300 ft. and levels have been 
driven at 100, 200, and 300 ft., and at 200 and 300 ft. re- 
spectively. Ore reserves opened are estimated at 129,47S 
tons, worth $1,470,522. while probable reserves total 371,250 
tons, worth $3,408,750. A mill of 150-ton capacity is in 
operation, and duplication is now under way. A descrip- 
tion will appear in another part of this journal. Mining 
and milling costs total $4 per ton. 



GOLDFIELD CONSOLIDATED REPORT 

During the month of May, according to the report of 
Albert Burch, the general manager, the total production of 
the mine was 31,047 tons, of which the mining realization 
was $43,767, and Milling & Transportation Co.'s profit and 
miscellaneous earnings were $175,677. Operating costs pet- 



ton were as follows: 

Mining, including stoping and development $3.31 

Transportation 0.09 

Milling 1.93 

Marketing 0.05 

General expense 0.25 

Bullion tax 0.04 

Construction 0.03 

Marketing ore shipped 1.46 

Total costs J $7.16 

Miscellaneous earnings 0.02 

Net costs $7.14 



Development covered 3898 ft. "While this work did not 



r>«ult In the discovery of any new ore body of sufficient 
Importance to deserve mention. It did open for stuping sev- 
eral small shoots, as Is evidenced by the fact that the value 
of the ore obtained from development was more than 
sufficient to pay for this work, Including the coat of the 
usual large amount of work done In barren ground. On 
tin- second level of the Combination, the 136 MX sill whh 
extended, and produced 180 tons of ore averaging $12 Dal 
ton. The 414-D winze was sunk 86 ft. vertically below the 
bottom level preparatory to cross-cutting to the Rellly vein 
nt that depth. 

The No. 3 R sill on the new No. 1 level of the Mohawk 
mine was extended, and produced 189 tons of ore averaging 
$16.50 per ton. On the old No. 1 level, about 600 ft. north- 
west of the shaft, the 170 BX sill was started and produced 
244 tons of $7 ore. The 345 A sill on the No. 3 level was 
extended, and produced 188 tons of ore averaging $9 per ton. 
Driving was continued during the latter part of the month 
on the narrow streak of high-grade ore reported last month 
in the 293 D raise. It has improved in grade, but has not 
developed an Important orebody as yet. 

The 901 E sill on the intermediate of the Clermont-Jumbo 
below the No. 8 level, produced 432 tons of $38 shipping 
ore. 



COMPAXIA MINERA CHONTALPAN Y ANEXAS 

The property of this Company, which is situated in the 
Zacualpam district of the state of Mexico, has been operat- 
ing almost continuously during the past year, according to 
the annual report which has just been issued. • The Com- 
pany has experienced some trouble with the Zapatistas, 
who have been in this district for some time, but the loss 
to this source up to date has been small, not exceeding 
4*4000, which damage was done to the assay office on one 
occasion. The concentration plant has been running with- 
out interruption for the past year. Plans have been made 
for the construction of a cyanide plant and the machinery 
has been ordered. It was expected to have this plant in 
operation by the first of the present year, but owing to the 
difficulties of transportation to the mines, due to disturbed 
conditions, this work has progressed slowly. It is expected, 
however, to have this plant in operation some time in July. 
The Company is capitalized at P350.000 and its present 
position may be summarized as follows: 



Development work, feet 2,910 

Cost of development *" 41,589 

Ore reserves, net value 420,900 

Total production during the year 355,498 

Expenditure in all departments 165,133 

Profit 190,365 



It was expected to begin the payments of dividends on 
March 15 of the current year of PI monthly. The condition 
of the business is reported to warrant larger dividends, but 
as the expenses of constructing the other new plant and 
other improvements have not as yet been paid, the larger 
dividends which are expected will be deferred until a later 
date, when the present obligations have been met. 



BRISEIS TIN & GENERAL MINING COMPANY, LTD. 

This Company operates tin mines at Derby, Dorset county, 
Tasmania, and gold properties in northeast Victoria, Aus- 
tralia, being worked by hydraulicking and dredging, re- 
spectively. During 1912, the tin properties yielded 539 tons 
of black tin, equal to 391 tons ef metal, realizing an average 
of $1033.44 per ton, a total of $404,075. The dredges handled 
1,547,600 cu. yd. of gravel averaging 11c. per yd., or $170,230. 
Working costs were 5.5c. per yard. The total income was 
therefore $574,305. The year's profit on all operations 
amounted to $297,600, while $216,000 was paid in dividends, 
and $101,000 carried forward. The original Briseis property 
is nearly exhausted of tin 'drift,' and production will in 
future depend on the Krushka and Ringavoona sections, 
which will entail considerable engineering work. These 
sections are estimated to contain 800,000 and 8,947,300 cu. 
yd. of 'drift' respectively, containing 750 and 4569 tons of 
black tin, which should be won at a cost of $90S per ton. 



MINING AND SCIENTIFIC PRESS 



July 5, l'tl-l 



Concentrates 

Most of these are In reply to questions received by malL 
Our readers are Invited to ask questions and give informa- 
tion dealing with the practice of mining*, milling, and smelting. 



Mai iiine-dhills totaling 9018 are In commission in Rand 
mines. 

Borax, maoxesite. ami I'll home production of the I'nited 
Slates in 1912 came soliiy from California, according to 
the Stale Mining Bureau. 



RrnutNfi permits Issued in San Francisco between April 
1908 and June 25, 1913. totaled $50,000. involving an ex- 
penditure of $225,227,000. 

Ql'Ansm pbblch suitable for tube-mills are being pro- 
cured from I he Powder river. Baker county. Oregon, .'or 
the Cornucopia Mines Company. 



The xtw 2 compartment kiiakt of the Commonwealth Ex- 
tension Mining Co.. at Pearce. Arizona, was recently sunk 
206 ft., and timbered 196 ft.. In .in days. 



The Ai-thi r mill of the Utah Copper Co. at Garfleld 
originally contained 312 Mssen stamps. These were re- 
placed by twenty-six 16 by 37'-.-ln. Garfield rolls, and a 
similar number of 6-ft. Chilean mills. The capacity of 
the plant was increased from 3000 to 9000 tons per day. 



Fi t or-spar PRom c-noN in the United States In 1912 
amounted to 116.645 tons valued at $769,163. This came 
from Illinois. Kentucky. Colorado. New Hampshire, and 
New Mexico. In the order named. Analyses of gravel 
fluorspar show 71.65 to 92.31-; CaF„ 4.15 to 28.33', SiO... 
1.19 to 6.41 r ', CaCO,. and 1.07 to 4.75% Fe,0,. 



Coke wtoot ctios of the United States In 1912 was 43,916. 
834 tons, valued at $111,523,336, an Increase of 8,366,345 
tons, valued at $27,392,487. over that of 1911. The output 
from by-product ovens is Increasing, this being 3.200,000 
tons, compared with the previous year. In all. there were 
102.080 coke-ovens In operation The average quantity of 
coke made from coal was 67 per cent. 



Mo-ixiKHAU'iTt Is a copper oxide with SIO„ CO,, and 
H,0. 1 1 is massive, occurring as a pitchy black layer a few 
millimetres In thickness over a nucleus of cuprite, this 
kernel being surrounded by a banded green zone of chryso- 
colla and malachite, and this again by quartz, the whole 
forming nodules having an average diameter of 120 mm. 
and of much beauty in cross-section. The black mineral 
when pure has a brilliant lustre and Is very brittle. Hard- 
ness 4. and specific gravity 4.141. Analyses show the fol- 
lowing composition: 8I0„ 7.80: CO,, 7.17; CuO. 76.88; ZnO. 
0.41: Fe : 0„ 0.07: and H.O. 7.71. 



Bi llion assays are made at the Perth l Western Austra- 
lia) mint In duplicate, one by weighing the cornets by a 
modification of Foord's compensating weight method, and 
Ihe other by a direct-weight system. It has been found 
that under the conditions of work employed, there is the 
same difference In surcharge for equal differences in fine- 
ness, so that the surcharge of a cornet can be resolved 
into two parts: one a correction proportional to the One- 
ness of the bullion, or proof, but constant for all fires, and 
the other a correction constant for all cornets In a fire, 
hut varying In different fires. The first correction Is made 
by adjustments applied to the weights and ordinary rider 
used, and the second by placing an extra 'surcharge' rider 
in the requisite position on the beam. The balance read- 
ing thus gives the fineness directly, corrected for surcharge. 



Orvpiiite is useful in steam boilers to prevent formation 
of scale. The best and simplest way Is to feed it into the 
feed-pump suction line. Feed about one pint (0.5 lb.) graph- 
ite Into each boiler each day of 12 hours For every 100 hp. 
above 250 hp. an extra one-third pint of graphite should be 
used. Boiler graphite forms a thin slippery film over the 



boiler lining.-, protecting them from the action of acids in 
the water and associates itself with the sediment which 
is formed. This prevents the formation of hard scale and 
keeps the solid residue thrown down by the evaporation 
of the water in such a soft condition that it can easily lie 
ejected from the boiler by the process of*blowlng off. If 
the water is not blown off sufficiently often, this sediment 
forms in%quantlties large enough to necessitate cleaning 
the boilers. Any boiler using bad water should be blown 
off every 12 hours. After all the old scale has been re- 
moved, the dally injection of graphite may be decreased 
slightly. It is the continual introduction of a small amount 
of graphite that brings about satisfactory results. In addi- 
tion to the above, put about two quarts of graphite into 
a boiler each time after cleaning. The water will aid lo 
distribute the graphite evenly over the heating surfaces. 
Boilers of more than 250-hp. capacity require an extra 
pint of graphite for each additional 100 horse-power. 



Agricola, in 1556. wrote the following in 'De Re Metal- 
Ilea' regarding renae profunda*, or fissure veins. The direc- 
tion in which the 'head' (outcrop) of the vein comes into 
the light, or the direction (oward which the 'tall' extends, 
is Indicated by Its foot-wall and hanging wall. The latter 
is said to hang, and (he former to lie. The vein rests on 
Ihe foot-wall, and the banging wail overhangs it; thus, when 
we descend a shaft, the part to which we turn the face is 
the foot-wall and 'seat' of the vein, that to which we turn 
the back is the hanging wall. Also In another way, the 
'bead' accords with the foot-wall and the 'tall' with the hang- 
ing wall, for If the foot-wall is toward the south, the vein 
extends its 'head' into the light toward the south: and the 
hanging wall, because it Is always opposite to the foot- 
wall. Is then toward Ihe north. Consequently, the vein ex- 
tends Its 'tail' toward the north If it is an inclined t'enn 
profunda. Similarly, we can determine with regard to east 
and west and the subordinate and their intermediate direc- 
tions. A rrna profunda which descends into the earth may 
be either vertical. Inclined, or crooked: the foot-wall of an 
Inclined vein is easily distinguished from the hanging wall, 
but is not so with a vertical vein: and again, the foot-wall 
of a 'crooked' vein Is inverted and chnnged into the hang- 
ing wall, and contrariwise the hanging wall Is twisted Into 
the foot-wall, but very many of these crooked veins may be 
turned back to vertical or Inclined ones. 



A PEiTi.iAHiTY common to all the mines In the Kolar 
goldfleld. India, is the amount of mercury which Is ex- 
tracted during treatment by cyanide. It was a distinct 
trouble to the chemist in charge, according to H. M. Leslie, 
and entailed a great deal of extra work at clean-up. The 
amount of mercury which was extracted from the pan 
slime was considerable, as much as from '■, to 1 oz. per 
ton being common. This mercury was deposited in the 
zinc-boxes, and materially and adversely influenced the 
quality of the bullion which was obtained. Its effect was 
lo make the whole of the zinc exceedingly brittle, so that 
ihe contents of the first three or four compartments were 
amalgamated and formed a zinc sludge, the greater part 
of which was zinc. This had all to be removed at clean- 
up, together with a proportionately large amount of short 
zinc from the other compartments, In order to prevent a 
continual congestion of the boxes. The extraction of gold 
by cyanide was always satisfactory, notwithstanding the 
presence of the mercury In the material. The averase 
original assa> was from 2 to 3H- dwt. per ton, and the 
residue assayed from 8 to 21 gr. of gold per ton, as the 
weather and other conditions of treatment varied. A pre- 
caution which was found to be necessary in dealing with 
the ieachings' from this class of material, was that the 
gold-bearing solution, before passing into the zinc-boxes, 
had to be freed of any slime which might have been drawn 
through the filter-cloths of the percolators. The most effi- 
cient type of settling-vat for this purpose was found to 
be one constructed after the pattern of a zinc-box, bu.t of 
much greater depth, each compartment being packed with 
cocoanut fibre to which the fine particles adhered. These 
were cleaned out at Intervals. 



Jul) v i!H i 



MINING AND SCIENTIFIC PRESS 



Recent Publications 



L*aoa Legislation or 1911. Labor Laws of the United 
States. Series No. 1. Bulletin of the U. 8. Bureau of Labor, 
No. III. P. 363. Chart. Washington. 1913. 



Retail Paters. 1890 to 1913, Inclusive. Bulletin 113. 
Coat of Living Series. No. 6. P. 163. Bureau of Labor 
Statistics. Washington, 1913. 

Annual RrroaT on the Mixehai. Production or Canada. 
1911. Compiled by John MrLelsh. Department of Mines 
bulletin. P. 316. Ottawa. 1913. 



IT. 8. Geological Survey papers. Washington, 1913: 
Production or AnitvxivE Materials in 1912. By Frank 

J. Kali Advance chapter from 'Mineral Resources of the 

United States. 1912.° P. 14. 

RECURRENT TroPIDOI.EPTUH ZONES OF THE UPPER DEVONIAN 

i\ New York. By Henry S. Williams. Professional Paper 
79. P. 103. III., chart. Index. 



University of California publications. Department of 
Geology. Berkeley, 1913: 

Ski m, and Dentition of a Camei. from the Pleistocene 
of Ram no La Brea. By John C. Merrlam. P. IS. III. 

PETBOGRAJPHIG Designation of Ai.li'viai. Fan Formations. 
By Andrew C. Lawson. P. 9. 

Notes ox Scitella Norrisi and Scltaster Andersoni. 
By Robert W. Pack. P. 7. 111. 



Western Australian Government Water-Supply papers. 
Perth, 1912-13: 

Water Supplies in Agriculti ral Areas. P. 52. Maps. 

Metropolitan Water-Supply, Sewerace. and Drainaok 
Department of Perth, Annval Report 1911-12. P. 27. 
Plans, maps. 

Goliifiei.ds Water-supply Administration. Annual re- 
port. 1911-12. P. 31. Diagrams. This report deals witli 
the operation of the water scheme, 353 miles long, supply- 
ing the Eastern Goldfields of the state. 



Bureau of Mines publications. Washington, 1913: 
Flash Point of Oils. By Irving C. Allen and A. S. 
Crossfleld. 

Technical paper 49. Petroleum Technology 10. P. 31. 
111. 

Foundp.v Ci pola Gases and Temperatures. By A. W. 
Belden. Bulletin 54. P. 29. 111. 

Permissible Exri.osivES. By Clarence Hall. Technical 
Paper 52. P. 11. This paper gives details of such explo- 
sives tested prior to March 1, 1913. 

Riles and Regulations to Goverx the Coal Mines at 
GEno. Wyoming, leased to the Owl Creek Coal Co. P. 13. 
These mines have been leased by the United States to this 
company. 



Colorado State Geological Survey bulletins, Denver, 1913: 
Geolo<;y and Ore Deposits of the Alma District. Park 

County-. By Horace B. Patton, Arthur J. Hosltin, and G. 

Montague Butler. Bulletin 3. P. 284. 111., maps, charts, 

table, index. 

Geology and Ore Deposits of the Monarch and Tomichi 
Districts, by R. D. Crawford. Recoxxaissaxce of the 
Geology of thk Raudit Ears Region, by F. F. Grout, P. 
G. Worcester, and Junnis Henderson. Permian or Permo- 
Cardoxiferous of the Eastern - Foothills of the Rocky 
Mountains in Colorado, by R. M. Butters. Bulletin 5. P. 
418. 111., maps, charts, index. 

Common Minerals and Rocks. Their occurrences and 
uses. By R. D. George. Bulletin t>. P. 406. 111., map, 
index. 



Report of the Conservation Commission of the State 
of California. By George C. Pardee, Francis Cuttle, and 
J. B. Baumgartner, Commissioners. P. 502. 111., maps, 



chart. Buramento. 1913. This Commission has bean IK 
months investigating tba natural resource* of California, 
Including forests, water-supply. Irrigation, and flood unit r 
contraL The subject of irrigation Is of great importmnco 
to ihe farming Industry, and this covers 344 pages In the 
volume. The 'Irrigation Resources of Southern California' 
Is discussed by C. K. Tail. Mineral lands, embracing 
dredging, oil, placer, and quartz operations, Is given five 
pages, and a special report was made on dredging by C. 
It Llpnian. but the Commission's report seems to be rather 
antagonistic to this mode of mining. 



United States GioIokIcuI Survey advance chapters from 
Mineral Resources of the United States, 1912.' Washing- 
ton, 1913: 

Production of Bauxite and Aluminum. By W. C. Pha- 
len. P. 16. 

Production ok Fluorspar and Cryolite. By Ernest F. 
llurchard. P. 9. Ill 

Production of Anthracite. By Edward W. Parker. P. 
19. 

Statistics of tin Pottery Industry. By Jefferson Mid- 
dleton. P. 16. 

Surface Water-supply of the United States, 1910. 
Pari XII. North Pacific Coast. Prepared under direction 
of M. O. Leighton by F. F. Henshaw, E. C. La Rue, and 
G. C. Stevens. Water-Supply Paper 292. P. 695. 111., index. 



A New Mine-Rescue Telephone Equipment 



The problem of devising ways and means for the pro- 
lection of human life in mines is probably the most im- 
portant question before mine-operators and the United 
States Bureau of Mines today. The laws of practically 
every state in which mining operations are carried on, call 
for regular inspections and also contain many safety regu- 
lations, not the least of which, in a number of states, is a 
section making compulsory the use of telephones under- 
ground. 

During the past few years, the Western Electric Co. has 
furnished several thousand mine telephones for under- 
ground use. Through this intimate association with those 
interested in mine-safety work, attention was directed to 
The urgent need for some means of instant and continuous 
communication between an advance or rescue party 
equipped with its oxygen apparatus and the rear party 
outside the mine. In the past, members of rescue parties 
have lost their lives where loss of life could have been 
prevented by a quick and reliable means for summoning 
aid. The demand for this type of equipment has been 
met by the Western Electric Co.. which has succeeded in 
producing a light, serviceable, and extremely simple tele- 
phone equipment for use in rescue work. In developing 
the apparatus, the United Slates Bureau of Mines was fre- 
quently consulted, in order that every requirement of this 
severe service might be fully covered. 

A man wearing an oxygen helmet, which covers his 
mouth, cannot use the ordinary type of telephone trans- 
mitter, so that a special type of transmitter, known as 
the 'throat' transmitter, has been developed to meet this 
unusual condition. The transmitter is light and compact, 
and is provided with a soft rubber cup to adapt itself 
to the curves of the throat. This throat transmitter has 
been found by actual test to transmit speech practically 
as well as the standard Bell instruments. Both receiver 
and transmitter are held firmly in position in such a 
manner that they will not interfere with any type of oxy- 
gen apparatus now on the market. The telephone equip- 
ment used by the man ou the outside is a standard switch- 
board operator's set consisting of a chest type transmitter 
and head-band receiver. 

The rescue party is connected with the rear by means 
of a small' wire cable consisting of two insulated copper 
conductors covered with a stout linen braid impregnated 
with moisture-resisting compound. This wire is in 500-ft. 
coils and is carried in a leather case fastened to the 
helmet man's belt, paying out as he advances. As the 



40 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 



colls are light, weighing less than 3 lb. apiece, several 
of them can easily be carried, and as one Is run out, 
another can be connected by means of a plug and jack 
combination. The wire Is so wound that it cannot become 
tangled and will pay out In whatever position the helmet 
man may have to assume. The total weight of telephone 
equipment carried by the helmet man, including one 
coll of wire, is a little over 5 lb. One end of the coll 
carries an aluminum-encased plug which connects with 
the head receiver and throat transmitter by means of an 
aluminum-encased jack. The other end is equipped with 
a similar jack connecting with a plug and cord running 
to a batUry and apparatus box. This box is an essential 
part ot the equipment and must be situated at the point 
from which the rescue party is being directed. It con- 
tains eight dry batteries mounted in a Patterson screw- 
type battery-holder, and a key, two jacks, and a battery 
gauge mounted In a removable compartment. The oper- 
ator's telephone set is connected to the apparatus and 
battery box by means of a cord, plug, and jack. 

In many cases it may be found desirable to use cable 
for carrying the talking circuit down a shaft or to the 
edge of the danger zone. For this purpose a large box, 
including a cable reel, is furnished. The box holds 1300 
ft. of specially strong and flexible cable. A heavy ratchet 
and pawl are provided to prevent the reel from turning 
after enough cable has been paid out. Connections with 
the apparatus box and the coil carried by the helmet-man 
are effected by means of aluminum-encased jacks and 
pings, while electrical contact with the inside end of the 
reeled cable Is made through collector rings and commu- 
tator brushes connected to a jack. 

The entire outfit has been designed and constructed with 
a view to providing practical and serviceable telephone 
equipment for mine-rescue work. Service tests have proved 
that this object has been attained, and the telephone equip- 
ment should he of incalculable benefit to those engaged 
in rescue work. 



The Haldane Flame-Test Apparatus 



While the percentage of fire damp in mine-air can be 
readily estimated by means of the cap on a lamp-flame, 
no equally simple test has hitherto been available for esti- 
mating the amount of black-damp in the air. Black-damp, 
as ordinarily met with, is simply nitrogen mixed with 
from about 5 to 20% of carbon dioxide. It is the residual 
gas resulting from various oxidation processes in mines 
and the surrounding strata. It might, perhaps, seem 
simpler and more logical to discard the use of the term 
'black-damp' and refer only to the deficiency of oxygen 
and excess of carbon dioxide in the air. To the miner, 
however, black-damp is a real entity; and although the 
proportion of carbon dioxide in black-damp varies, black- 
damp is quite definitely characterized by its origin and by 
its effects on lights and on men. When air is mixed with 
black-damp, the oxygen percentage of the air is lowered 
in proportion to the amount of black-damp added. The 
percentage diminution in the oxygen is thus a measure 
of the percentage of black-damp, unless fire-damp or some 
other gas is present in appreciable amount, and helps to 
lower the oxygen. A flame-test can thus be graduated 
either to percentages of oxygen, or, as seems simpler, to 
percentages of black-damp. As the oxygen percentage in 
air diminishes, the flame of a candle or lamp is affected 
in two ways. In the first pla^e, the light given steadily 
diminishes. Roughly speaking, the light of a candle or 
lamp diminishes by 307,- with a fall of 1% in the oxygen 
percentage, and the flame will no longer burn when the 
oxygen has fallen from the normal (20.93%) to about 17.5%. 
A further effect is that the flame becomes less and less 
stable as the oxygen percentage diminishes: it is more 
and more easily blown out by any chance draught or 
movement. To those who work or move about In 'dull' 
air, this is painfully familiar: their light is constantly 
going out. It is upon this latter fact that the test now 
to be described is based. 



The apparatus for the test consists of a piece of glass 
tube and some thin tapers. When a lighted taper is held 
inside the tube, an upward draught is, of course, produced 
by the heat; and this draught varies in strength, accord- 
ing as the taper is held high up or low down in the tube. 
The draught tends, naturally, to blow the flame out; and. 
according to the percentage of oxygen in the air, the flame 
is extinguished at a point lower down or higher up in 
the tube. The size of tube chosen as being convenient 
for the test is one 7 in. long by 0.75 in. internal diam- 
eter. The main graduations are In percentages of black- 
damp, from up to lOVd: and there are subsidiary cor- 
responding graduations in percentages of oxygen, from the 
normal of 20.9 down to 18.8. Below about this percentage 
the taper will no longer burn in the tube; and when held 
upright, it will no longer burn outside the tube with less 
than about 18.2% of oxygen or 13% of black-damp; but, 
when held in a horizontal position, it will still burn until 
the percentage of oxygen has fallen to about 17.2, or 187c 
of black-damp. There is thus a wide range within which 
the proportion of black-damp can be estimated by the 
taper and tube. As the flame becomes very small when 
it is just on the point of extinction, its position with 
respect to the graduations on the tube can be determined 
quite easily. The lighted taper should be first pushed up 
to a point where it burns easily, and then gradually low- 
ered. With a little practice, it is easy to find with con- 
siderable exactness the point at which It just extinguishes. 
If there is much black-damp in the air, it may be nec- 
essary to push the taper through the tube before lighting 
it. and then to lower it cautiously into the tube. The 
tapers used are 1/16-in. diameter, the thinnest that it 
was possible to obtain. Thicker tapers are much less 
convenient, and are apt to crack the glass. The tubes 
must, of course, be held vertically while the test is being 
made and to prevent the glass from cracking. The tube 
of the size specified has been graduated by experiments in 
an air-tight chamber, the black-damp being produced either 
by respiration or by allowing gas to burn in the chamber. 
The experiments showed that the tube indicates the state 
of the air with surprising sharpness and accuracy. Ex- 
periments show that, under favorable conditions, the ac- 
curacy is greater than that ordinarily reached by a Hem pel 
gas-analysis apparatus. Similar accuracy cannot, however, 
be expected in tests made underground, unless trouble- 
some corrections are introduced for the varying percent- 
age of moisture In the air and the varying proportion of 
carbon dioxide in the black-damp, and unless great care 
is taken as to the exact point at which the flame is just 
extinguished. 

It appears from these experiments that the method is 
sufficiently delicate to make it very useful in estimating 
the percentage of oxygen, or of black-damp, in the air of 
a mine. For ordinary practical purposes, it is greatly 
preferable to chemical analysis, as it gives the informa- 
tion at once, and the test, can be repeated in as many 
places as may seem desirable. It does for black-damp 
what the cap-indications do for fire-damp, and with its 
help the proper distribution of air in a naked-light mine 
can readily be controlled. For instance, the return-airways 
may be tested at different points, and excessive leakage, 
or defective arrangement of regulators, can be detected 
at once. The tube method must not. however, be supposed 
to do mere than it actually accomplishes. For instance, 
it does not. of course, detect carbon monoxide. Air con- 
taining after-damp, or fumes from explosives or an un- 
derground fire, might be excessively dangerous, although 
the tube test would show that the air contained less than 
8% of black-damp. Unless the tube gave practically no 
indications at all of impurity, one could not be sure from 
its readings alone that dangerous proportions of carbon 
monoxide were absent from the air of a mine. Of course, 
the tube would be far better than a lamp. Arrangements 
have been made with Siebe, Gorman & Co., Ltd., H. N. 
Elmer, Agent, 1140 Monadnock block, Chicago, to supply 
the whole apparatus complete, with metal case and an 
inner tube to hold the tapers, and a holder for use when 
a taper has to be held far up in the tube. 



July .*.. 1913 



MINING AND SCIENTIFIC PRESS 



17 



In November 1909, the House of Lords. England, delivered a unanimous judgment in 
favor of the Minerals Separation, Ltd., in an action brought by the Elmore Process. A 
similar judgment was given July 24, 1911, by the New South Wales Court in an action 
brought by the same plaintiff. 



THE MINERALS SEPARATION 
FLOTATION PROCESS 

CAN BE SUCCESSFULLY APPLIED 

FIRST: 

Where the mineral values in the material to be treated are friable, whether it is crude 
ore, tailing, or slime, and where wet concentration fails to catch the mineral particles. 

SECOND: 

Where the mineral contents to be saved and the gangue or waste are of so nearly the 
same specific gravity that the separation is crude and sometimes wholly ineffectual by 
wet concentration. 

These two conditions are found often in zinc, lead, silver and copper ore, and in the 
tailing and the slime rejected in treating ore containing these metals. 

THE FLOTATION PROCESS 

AS INVENTED, PERFECTED AND OWNED BY THE 

MINERALS SEPARATION, LTD. 

has been highly successful in Australia and elsewhere, and already over $20,000,000 
worth of zinc metal, besides lead, silver, and copper amounting to millions of dollars 
worth more, are being produced by means of the Minerals Separation process. 

This process has been installed at several important mines in the United States and 
Canada, and results are being obtained which are far superior to the results from ordi- 
nary wet concentration. 

Metallic copper can be produced at from $20 to $30 cheaper per ton by the aid of this 
process, from the same ores at many mines, than has hitherto been possible by any other 
concentration method. 

This company has now fully covered its apparatus and process by no less than fifteen 
separate patents granted by the United States, and also by Mexico and Canada. This 
company also owns the Potter & De Bavay patents for the whole of the World. 

Mine owners, metallurgists, and others interested in preventing sulphide losses, and re- 
ducing the cost of treatment, are invited to send their enquiries. 

1 TO ! 

Minerals Separation American Syndicate, Ltd. 

Sole Agents: Chief Engineer: 

MESSRS. BEER, SONDHEIMER & CO. E. H. NUTTER 

42 Broadway, New York Merchants Exchange Bldg., San Francisco 



NOTE. — Notice is hereby given that no one except our Chief Engineer and the Agents 
named above is authorized to act for or represent the Minerals Separation, Ltd., or to in- 
troduce their processes or apparatus into the United States, Canada and Mexico. 



18 



MINING AND SCIENTIFIC PRESS 



July .">. 191: 




HARDINGE MILLS 



ARE BUILT TO SUIT YOUR REQUIREMENTS 



NO MATTER WHAT METALLURGICAL PROCESS YOU ARE 
USING, OR INTEND TO INSTALL, THERE IS A HARDINGE 
MILL SUITED TO YOUR INDIVIDUAL PROBLEM. THE VA- 
RIOUS TYPES ARE BUILT TO COVER THE COMPLETE 
RANGE OF FINE GRINDING REQUIREMENTS. 

TODAY THERE ARE HARDINGE MILL INSTALLATIONS 
IN ALL PARTS OF THE WORLD, OPERATING IN CON- 
CENTRATING, AMALGAMATING, CYANIDE AND FLOTATION 
PLANTS, AND THE REPEAT ORDERS THAT WE ARE CON- 
TINUALLY RECEIVING TESTIFY TO THE SATISFACTION 
THEY ARE GIVING. 



HARDINGE CONICAL MILL CO. 

50 CHURCH ST. 
NEW YORK 

London : Cable Address: 

663 Salisbury House Halhardlng, New York 

o_, . _ f Montana. Nevada. Idaho, Utah — Mine & Smelter Supply Co. 

oaies Agents For ( Colorado. Wyoming, N. Mexico, S. Dakota-Hendrle & Bolthoff Mfg. & Supply Co. 



July V UM 



MINING AND SCIENTIFIC PRESS 



ro $&s$ \ on ci P c \ v& c to nj - 

O.iKjiiuvro . £)l I e hi f ft i rg i Ma an^ JjooPocji:>h> 

ARRANGED GEOGRAPHIC ALL Y-FOH AOORESSCS Set CARDS ON FOLLOWING PAGES 



RATIS i One-halt Inch, »3S oor wear (48 cants oar wveok ) . Combination rato with THE minimi: MACAZINC of London, 
ono.hatr Inch In maoh, S40 tjor year (77 contm par tvaafcj. Submarlotlon Included. 



UNITED STATES 



ILARK I. 

Polaon. W. U 



Wll/IIN %. 

Blauvelt. Harrington. 
Burch. H. Kenyon. 
Colllna, Edgar A. 
IvKalb. Courtenay. 
PU-kard. Byron O. 
Smith .v Zelaamer. 



i kUFORHl v. 

Abbott. James W. 
Addtton. A. Sydney. 
Arnold. Ralph. 
Bain. H. Foster. 
Balrd. Dudley. 
Beatson. A. K. 
Brodley. Fred. W. 
Burch, Caetanl & 

Hershey. 
Carpenter. Alvln B. 
Clark. Baylies C. 
Clark. C. C. 
Clevenger, G. Howell. 
Cox & Juessen. 
Cranston, Robert E. 
Dennis. Clifford G. 
Dennis, F. J. 
Eye. Clyde M. 
Folsom. D. M. 
Foratner. William. 
Fowler, Edward J. 
Free, E. E. 
Grunsky. C. E.. Jr. 
Haggott, Ernest A. 
Hager, Dorsey. 
Harvey, F. H. 
Hellmann, Frederick. 
Hoffmann, Ross B. 
Hubbard. J. D. 
Hunt & Co.. Robt. W. 
Innes, Murray. 
Janin, Charles. 
Johnson, Harry R. 
Jueasen, Edmund. 
Kerr. Mark B. 
Lanagan, W*. H. 



McLaughlin. R. P. 
Merrill. Charles W. 
Merrill. Frederick J. H. 
Morris. F. U 
Mudd. S.eley W. 
Munro. C. H. 
Myerfc, Deaalx B. 
Nelll. James W. 
Newman A Reals. 
Noyea. William S. 
Osmont, Vance C. 
Pollak Co., The A. J. 
Prlchard. W. A. 
Probert. Frank H. 
Radford, William H. 
Ralnsford, R. S. 
Read. Thomas T. 
Ross. G. McM. 
Ross. John. Jr. 
Royer. Frank W. 
Scott. Robert. 
Slmonds, Ernest H. 
Sizer. F. U 
Smith. Howard D. 
Stebblns, Elwyn W. 
Storms. William H. 
Thorn. Robert. 
Tlmmons. Colin. 
Tolman. Cyrus Fisher, Jr. 
Turner. H. W. 
Von Berncwltz, M. W. 
Wiseman. Philip. 
Wolf. J. H. G. 



COLORADO. 

Allen & Colburn. 
Argall & Sons. Philip. 
Bancroft, Howland. 
Chase. Charles A. 
Collins, George E. 
Dorr. John V. N. 
Draper & Gross. 
Fairchild. 0. H. 
Farlsh, John B. 
Finch. John Wellington 
•irlfflth & Co.. T. R. 
Hale, Alfred H, 
Hills & Willis. 



Holland, I. r s 
Raid. Walter L. 
Revett, Ben Stanley. 
Rlckard. Forbes. 
Toll. Rensselaer H. 
Warwick. A. W. 
Worcester. S. A. 



IDAHO. 

Anderson ft Son. G. 

Scott 
Eaaton, Slanly A. 
Edwards. R. L. 
Livingston & Stewart. 



ILLINOIS. 

Hollta. H. L. 

Hunt & Co.. Robert W. 



MASSACHUSETTS. 

Eveland, A. J. 
Richards. Robert H. 
Rogers, Allen Hastings. 
Wenstrom. Olof. 



MICHIGAN. 

York. Grant & Co. 



MINNESOTA. 

Collins, Edwin James. 
Wlnchell. Horace V. 



MISSOURI. 

Hall. R. G. 
Klrby, Edmund B. 
Malcolm.son. Jas. W. 



MONTANA. 

Creden, William L. 
Greene. Fred T. 



NEVADA. 

Addlton. A. Sydney. 
Bristol. J. J. 

Brown Eng. Co.. Walter 
M. 

Cutler, H. C. 
Edsall, Burroughs. 



Lmkenan. C. B. 
Raid, John T. 
Symmes. Whitman. 
Wilkinson. C. D. 

\i:\v MJB3CICO. 
Clifford. James O. 

Klnnon, Wm. H. 



NEW YORK. 

Aldrldge. Walter H. 
Armstead. Henry Howell. 
Ball, Sydney H. 
Beatty. A. Chester. 
Benedict Wm. de L. 
Brodle. Walter M. 
Channlng. J. Parke. 
Clements. J. Morgan. 
Cox. W. Rowland 
Cranston. Robert B. 
Doveton. Godfrey D. 
Dufourcq. Edward L. 
Dwight. Arthur S. 
Farlsh. John B. 
Fearn. Percy L. 
Finch, John Wellington. 
Finlay. J. R. 
Garrey. George H. 
Hendryx, Wilbur A. 
Hunt & Co., Robert W. 
Lefevre, Henry F 
Leggett, Thos. H. 
Llndberg, Carl O. 
Lloyd, R. L. 
Mercer, John W. 
Minard. Frederick H. 
Mines Management Co. 
Olcott & Corning. 
Pearse. Kingston & 

Browne. 
Perry, O. B. 
Poillon & Poirler. 
Pomeroy, Wm. A. 
Raymond, Rossiter W. 
Ricketts & Banks. 
Riordan. D. M. 
Rogers. Allen Hastings. 
Rogers. Edwin M. 
Sharpless, Fred'k F. 



Slmonds A Burns. 
Spllnbury. E. Gybbon. 
Snasman. Otto. 
VonRoscnberg, Leo. 
Webber. Morton. 
Westervclt. William 

Young. 
Yentman. Pope. 



OREGON. 
Bacon, W. S. 
Miller. Bernard P 
Spauldlng. C. F. 



PENNSYLVANIA. 

Ayres, W. S. 
Chance. H. M. 
Clapp. Frederick G. 
DuBols. Mixer & Armas. 
Garrison. F. Lynwood. 
Goodale, Stephen L. 
Jandorf, M. L. 
Myers. Desalx B. 
Queneau, A. L. 
Spurr. J. Edward. 



PHILIPPINE ISLANDS. 

Hanlon, Russell Yale. 
Wllmot. H. C. 



TEXAS. 

Bradley. D. H.. Jr. 
Oglesby, John S. 
Wright. Louis A. 



UTAH. 

DuBois, Mixer & Armas. 
Jennings. E. P. 
Johnson. M. M. 
Krumb, Henry. 
MoKlm. J. W 
Nelll. James W. 
Sears, Stanley C. 
Winwood. Job H. 



WASHINGTON. 

Clark. V. V. 
Kehoe, Henry. 



AFRICA. 

Ackerman. Audley H. 
Bosqul, Francis L. 
Broadbridge, W. 
Dixon, Clement. 
Hunt, Bertram. 
Rotherham. G. H. 



ASIA. 

Beadon. W. R. Coleridge. 
Cole, F. L. 
Dickson, A. A. C. 
Drucker, A. E. 
Samwell, N. 

Smith, Reuben Edward. 
Vallentine. E. J. 



AUSTRALIA. 

Bellinger, H. C. 
Bray, Francis P. 
Grace. William Frank. 
Smith, J. D. Audley. 



CANADA. 

Beaudette, A. J. 
Brewer. Wm. M. 
Brown. H. B. 
Brown & Butters. 



Ferrier, W. F. 
Fowler, Samuel S. 
Hardman, John E. 
Keffer, Frederic. 
Klrby, A. G. 
Lamb. R. B. 
Levy, Ernest. 
Lorlng, Frank C. 



CENTRAL AMERICA. 

Hartley, J. H. 
Marsters. V. F. 
Stanford. Richard B. 



EUROPE. 

Alexander Hill & 
Stewart 

Andre Griffiths, Mann- 
heim & Co. 

Annable & Co., H. W. C. 

Arnold. Ralph. 

Bach, William. 

Bayldon. H. C. 

Beatty. A. Chester. 

Botsford. Robert S. 

Broadbridge, W. 

Brown, R. Oilman. 

Chaplin, George P. 



FOREIGN 

Collins, Henry F. 

Curie, J. H. 

DuBois. Mixer & Armas. 

Fennell, John Howard. 

Geppert, R. M. 

Griffith & Co.. Daniel C. 

Hamilton, E. M.. 

Henderson, J. A. Leo. 

Herzig, Charles Si. 

Holloway, George T. 

tloover. H. C. 

Hoover, Theodore J. 

Hutchins. J. P. 

Johnson & Sons Smelt- 
ing Works, Ltd. 

Jones. Henry Ewer. 

Kuehn, A. F. 

Loring. E. A. 

Loring, W. J. 

Macnutt. C. H. 

Merrlcks. Crane & Co. 

MIchell, George V. 

Mines Management Co. 

Nichols, Horace G. 

Pawle & Brelich. 

Payne & Co.. F. W. 

Pearse, Kingston & 
Browne. 



Perkins. Walter G.. & Co. 
Prisk. Thomas H. 
Purington. Chester W. 
Queneau. A. L. 
Rickard, Edgar. 
Rickard. T. A. 
Romer. B. F. P. 
Stines, Norman C. 
Stockft-hl, G. A. 
Teale. J. W. 
Thome. W. E. 
Thurston. E. C. 
Titcomb. H. A. 
Turner, H. W. 
Turner. Scott. 
Veatch & Anderson. 
Weatherbe, D'Arcy. 
Wright, Charles Will. 



MEXICO. 

Armstead. Henry Howell 
Babb. Percv Andrus. 
Bullock. L. N. B. 
Caldwell, Forest B. 
Crookshanks. H. F. M. 
Enos, Herbert C. 
Grothe & Carter. 
Helm, J. D. 



Hoyle, Charles. 
Mines Management Co. 
Nahl. Arthur C. 
Oldfleld. Frank W. 
Paul. W. H. 
Raymond. Robert M. 
Rover, Frank W. 
Shaw, S. F. 
Simpson, W. E. 
Stevens, Blarney. 
Tweedy, Geo. A. 
Warwick, A. W. 



SOUTH AMERICA. 

Chede & Davidson. 
Couldrey. Paul S. 
Crease. Herbert H. 
Decoto, L. A. 
Fraser, Lee. 
Gamba, F. Perelra. 
Hartley, J. H. 
Hellmann. Frederick. 
Jenks. Arthur W. 
Lamb. Mark B. 
Lewis, H. Allman. 
Loram, S. H. 
Strauss, Lester W. 
Young, James S. 



20 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 



ABBOTT, JAMES W., 

M Inlng Engl neer. 

Hollenbeck Hote!. Los Angeles, Cal. 



ACKERMAN, Audley H., 

Mining Knglneer. 

Rulawayo. Rhodesia, South Africa. 
Cable: Consulting. Usual Codes. 



ADDIT0N, A. Sydney, 

Metallurgical Engineer. 

Cyanide Mill and Plant Construction. 

318 Market St., San Francisco, 
And Rhyollte. Nev. 



ALDRIDGE, Walter H., 

Mining and Metallurgical Engineer. 

Care of Wm. B. Thompson, 
14 Wall St.. New York. 



ALEXANDER HILL & STEWART, 

Consulting Engineers and Metallurgists. 

* Broad St. Place, London, E.C. 



ALLEN & COLBURN, 

Engineers. 

Mining, Hydraulics, 
Milling. Irrigation. 
Ideal Bldg.. Denver. 



ANDERSON & SON, G. Scott 

Consulting Mining Engineers. 

Wallace, Idaho. 
Coeur d'Alene Mines. 
Code: Bedford McNeill. 



ANDRE GRIFFITHS, 

MANNHEIM & CO., 

Mining Engineers. 

Salisbury House, London. Cable: Nodule. 



ANNABLE & CO., H. W. C., 

Mining Engineers. 

27 Old Jewry, London, E.C. 
Cable: Annableng. Code: Bed. McNeill. 



ARGALL & SONS, Philip, 

Mining and Metallurgical Engineers. 

First National Bank Bldg., Denver. 
Cable: Argall. Code: Bedford McNeill. 



ARMSTEAD, Henry Howell, 

Consulting Engineer. 

29 Broadway, New York. 
Apartado 65, Guanajuato, Mexico. 



ARNOLD, Ralph, Cable: RalfarnolL 
Geologist and Petroleum Engineer. 

Union Oil Bdg„ Los Angeles, Cal. 
115 Broadway, New York. 
No. 1, London Wall Bdgs.. London E.C. 



AYRES, W. S., 

Mining and Mechanical Engineer. 

Hazleton, Pa. 
Consultation, Exam., Reports, Many 
years' exp us Mgr. Iron and Coal Mines. 



BABB, Percy Andrus, 

Mining and Metallurgical Engineer. 

Edlflcio La Cia. Bancaria, Mexico, D. F. 

Avenida 5 De Mayo No. 32. 
Table: Prosmlne. Code: R.^d. McNeill. 



BACH, William, 

Placer Engineer. 

Glyngarth, Beechwood Rd., 
Sanderstead, Surrey, England. 

Cntl*: M.S'. -ill. 1 90S 



BACON, W. S., 

Mining Engineer and Metallurgist. 

Kerby, Josephine County, Oregon. 



BAIRD, Dudley, 

Metallurgist and Engineer. 

Specialty: Copper. 
Care Pacific Foundry Co., San Francifco. 
Cable: Sm--lturgy, Code: Western Unron. 



BALL, Sydney H., 

Mining Geologist. 

71 Broadway, New York. 
Cable: Sydball. Code: Bedford McNeill. 



BANCROFT, Howland, 

ConMUltlng Mining Geologist. 

Suite 730 Symes Building, 
Denver, Colorado. 
Cable: Howban. Code: Bedford McNeill. 



BAYLD0N, H. C, 

Mining Engineer. 

Fort. No. 2, Sirdarensky Oblast, 
Russia, 



BEAD0N, W. R. Coleridge, 

Mining Engineer. 

Post Box 231, Rangoon, Burma, India. 
Cable: Mentor, Rangoon. 
Code: A. B. C. 5th Ed. 



BEATSON, A. K., 

Mining Engineer. 

Formerly manager Big Bend, Cal. 
Later at Latouche, Alaska. 
320 Central Bank Bldg.. Oakland, Cal. 



BEATTY, A. Chester, 

ConNultlng Mining Engineer. 

71 Broadway New York. 
No. 1 London Wall Bdgs., London. E.C. 
Cable: Granitic. Code: Bedford McNeill 



BEAUDETTE, A. J., 

Mining Engineer. 

Grand Trunk Pacific Railway, 
Wlnnepeg, Canada 
Cable: Bearr. Code: A. B. C. 



BELLINGER, H. C, 

Metallurgical Engineer. 

General Manager 
Great Cobar Limited, 
Cobar. N. S. W. 



BENEDICT, William de L., 

Mining engineer. 

19 Cedar St, New York. 



BLAUVELT, Harrington, 

Mining Engineer and Metallurgist. 

Prescott, Arizona. 
Mines examined and reported upon. 



B0SQUI, Francis L., 

Consulting Metallurgist. 

Rand Mines. Ltd., 
Johannesburg, Transvaal. 
Cable: Franbo. Usual Codes. 



BOTSFORD, Robert S., 

Mining Engineer. 

Nicolo-Pavda Mg. Dlst. Co.. Pavda 
Estate, Vyia Station, Bogostovsk, R. T., 
Government of Perm. Russia. 



BRADLEY, D. H., Jr., 

Mecbanlcnl Engineer. 

Specialty: Mining & Milling Machinery. 
Exam. & Equipment of Mexican Proper- 
tlea. 1700 Rampart St.. El Paso. Texas. 



BRADLEY, Fred W., 

Mining Engineer. 

Crocker Building, San Francisco. 
Cable: Basalt. Code: Bedford McNeill. 



BRAY, Francis P., * l,nin * 

* Engineer. 

Care Australasian Institute of Mining 

Engineers. Melbourne. 
Cable: Patrlclus, London. 
Code: Broomhall's Imperial. 



BREWER, Wm. M.. 

Mining Engineer and Geologist. 

P. O. Box 701, Victoria. B. C. 
Cable: Brewer. Code: Bedford McNeill. 



BRISTOL, J. J., 

Mining Engineer. 

Reno, Nevada. 



BROADBRIDGE, W., 

Mining Engineer. 

62 London Wall. London, E.C. 
Tarkwa, Gold Coast Colony. 
Cable: Rillstope. Usual Codes. 



BRODIE, Walter M., 

Mining Engineer and Metallurgist. 

care Batopilas Mining Co., 
45 Broadway, New York. 



BROWN, H. B., m.e., 

British Columbia Mines Bought, Sold, 
and Operated. 
510 Pender St.. Vancouver. B. C. 
Hedley, B. C. 



BROWN, R. Gilman, e m.. 

Consulting Engineer. 

62 London Wall, London, E.C. 
Cable: Argeby, London. Usual Codes. 



BROWN ENG. CO., Walter M., 

Successors to Brown-Tolman Eng. Co. 
Mining Engineers. 

Searchlight, Las Vegas and Good- 
springs. NVvn-la 



BROWN & BUTTERS, 

Mining, Metallurgy and Mining 
Geology* 

Prince Rupert, B. C, Canada. 



BULLOCK, L. N. B., 

Metallurgical Engineer. 

Mexico Mine & Smelter Supply Co., 
Mexico City, Mex. 
Cpble: Bullock. Usual Codes. 



BURCH, CAETANI & HERSHEY, 

Gelasio Caetani. 
Albert Burch. Oscar H. Hershey. 

Mining, Metallurgy, and Mining 
Geology. 

Crocker Bldg., San Francisco. 
Cable: Burch, Codes: Bedford McNeill, 
or Caetani. Moreing& Neal. 



BURCH, H. Kenyon, 

Mechanical and Metallurgical Engineer. 

Care Inspiration Consolidated 
Copper Co., 
Miami. Gila County. Arizona. 



CALDWELL, Forest B., 

Mining Engineer. 

Supt. The Candelaria Land, Mining & 
Power Co , Ltd.. San Dimas, Dgo., Mex. 
CaM-: Candelaria. Code: Bed. McNeill. 



CARPENTER, Alvin B., 

Mining Engineer. 

California Bldg., Los Angeles, Cal. 



CHANCE, H. M., Coal. 

ConMUltlng; Mining: Engineer. 

837 Drexel Bdg.. Philadelphia. 



CHANNING, J. Parke, 

Consulting Engineer. 

4 2 Broadway, New York. 



July 5, 1913 



MINING AND St U N I II K I'KI » 



L'l 



<p ro \l 65S ion of c i tgc I o n j- 



CHAPLIN. George P.. 



Hilling I nou. - 

41 Aahburnham Mansions. Chelsea, 

London. & W. 



CHASE, Charles A., 

Witting Koilnrrr. 

TI4 Klnt Nat. Bank Ode.. Denver. 
Liberty Ball O. aL Co.. TaTlurlda. Colo. 



CHEDE & DAVIDSON, 

4 on* tilting Mini on Kniilnrrn, 

Examinations and Report*. 

Representation and Management of 
Foreign Companies. 

Call. Rep. of Colombia, South America. 

Cable: Chedavl. 

Codes: Bed. McNeill. Lleber, A.B.C. 5th. 



CLAPP. Frederick G . < ■ ' '.v^/opix 

Aaaorlatrd Croluiclrnl Kniclnrt-ra. 

Reports on Oil. Gas and Mineral 
Properties. 
33 I V" 1 1 * ; •■ A v l'lttsburg. Pa 



CLARK, Baylies C. 



Mlninu mill Mei-tinnical Engineer. 

Sutter Creek. California. 



CLARK & CLARK, 

( nn.iiltlnc Mining Engineers. 

C. C. Clark. V. V. Clark. 

1003 H Broadway, 444 Henry Bdg., 

Oakland. Cal. Seattle. Wash. 



CLEMENTS, J. Morgan, 



^llnlne Bngiveer nnd G<>olog1nt. 

20 Broad St.. New York. 

Code: Bedford McNeill. 



CLEVENGER, G. Howell, 

Mrtnllurglcnl Engineer. 

381 Hawthorne Ave., Palo Alto, Cal. 

Code: Bedford McNeill. 



CLIFFORD, James 0., 

Mining nnd Consulting Engineer, 

Demlng, New Mexico. 
Especially conversant with the S.W. and 
M'-\i.^ T-;..,\. M.--X. , t. Union, 



COLE, F. L., 

Mining Engineer. 

Shanghai. China. 
Cable: Hanco. 



COLLINS, Edgar A. 



Mining Engineer. 

Commonwealth Mine, 
Pearce, Arizona, 



COLLINS, Edwin James, 

Mining Engineer. 

Mine Examinations and Management. 
1008-1009 Torrey Bdg.. Duluth, Minn. 



COLLINS, George E., 

Mining Engineer. 

Mine Examinations and Management. 

■120 Boston Bdg., Denver. 
Cable: Colcomac. „___ 



COLLINS, Henry F., 

Mining Engineer. 

Huelva Copper & Sulphur Co., Ltd., 
Valdelamusa, Prov. de Huelva, Spain. 
CablP: Huelv.icop. Co rlfi: Rroomhall. 



COULDREY, Paul S., 

Mining Engineer. 

Gen. Mining Supt. Cerro de Pasco Min- 
ing Co.. Cerro de Pasco, Peru, S. A- 
Cable: Cerrocop. 



COX, W. Rowland, and Staff, 

Consulting Specialists. 

Management, Operation, and Examina 
tion of Mines and Mills. 



cox & JUESSEN, 

Thomas Cos. Edmund Juessen. 

Mining nuil Mr. nllurKl.nl i ^ i - 

906 Mechanics' Inat. Bdf.. 

8an Francisco. 



CRANSTON. Robert E, 

Milling ' 1 1 .' I r , ■ . r 

81* Mill. Bdg.. Sun Franel.co 
Room 1408, No. 11 Plna St.. New York. 
OtJjlfJ H. i ram. Co.l.- McNeill, 1908. 



CREASE, Herbert H., 



Mining EniElueer. 

Santana, Honda, Rep. Colombia 
South America. 



CREDEN, William L., 

Oottssdtlns Mining KnKlneer. 

Mine Examination and Management, 

First National Bank Building, 
Butte. Montana. 



CROOKSHANKS, H. F. M., 

MlnluK Engineer nnd Cyanide Expert. 

la Capuchlnas No. 9, 
Mexico. D. F. 



CURLE, J. H., 



Mine Valuer. 

62 London Wall. London. 



CUTLER, H. C, e.u., 

Mining Engineer. 
401 S. Virginia St.. Reno, Nevada. 

Code: Bedford McNeill. 



DECOTO, L. A., e.m., 

Mining Engineer. 

Barranqulllo, Colombia. S. A. 
Care V. Dugand e Hljo. 
Cable: Decoto. Zaragoza. 



DE KALB, Courtenay, 

Consulting Engineer. Pacific Smelting 
& Mining Co. 
Tucson, Arizona. 
Cable: Dekalb. Cnde: Bedford McNeill. 



DENNIS. C. G., DENNIS, F. J., 

Mining engineers. 

Crocker Bdg., San Francisco, Cal. 
Cable: Sinned. Code: Bedford McNeill. 



DICKSON, Archibald A. C, 

Mining Engineer. 

Kodarma, E. I. Ry. India. 
Cable: Dickson. Nawada. Usual Code 



DIXON, Clement, 

Mining Engineer. 

P O. Box 305, Bulawayo, Rhodesia. 
Cable: Clement Dixon. Usual Codes. 



DORR John V. N., 



Metallurgical Engineer. 

Specialty; Cyanidation. 
733-734 First Nafl Bank Bdg.. Denver. 
Cable: Dorr. Code: Bed. NcN.. West. Un. 



DOVETON, Godfrey D., 

(With W. Rowland Cox.) 
Metallurgical Engineer. 

Specialist in Milling. Testing. Designing. 

1 65 Broadway. New York. 



DRAPER & GROSS, 

Marshall D. Draper. John Gross. 
Mining untl Metallurgical Engineers. 

709 Equitable Bdg., Denver, Colo. 

Code: Bedford McNeill. 



DRUCKER, A. E., M.I.M.M. (London) 
Consulting Metallurgist. 

Tech. Mgr., Concessions Minlere Fran- 
caise de Chang-Song, Nurupl Mines (via 
Unsan). Korea. Cable: Rondon, Seoul. 



Dubois, mixer & armas, 

Consulting Mining Engineers. 

302 Harrison Bdg.. Philadelphia. 
229 S.W. Temple St., Salt Lake City. 
2 Rue de la Verrerie. Paris. France. 



DUFOURCQ, Edward L., 

Mining Knilnrrr. 

Room C 11-13-24 Produce Exch. Annex, 

New York. 
Cable: Dufoiin a. Code: McNeill 



DWIGHT. Arthur S., 

Hliilim r.figltu*..r nml Hrtnlliirglst. 

29 Broadway, New York, 
("utile: Slnlerrr. 

I'mle: H. il Mi Ni III; Mln. rn A SmiH.rH 



EASTON, Stanly A., 

Mining Engineer. 

Manager Bunkor Hill & Sullivan Min- 
ing & Concentrating Company. 
Kellogg. Idnho. 



EDSALL, Burroughs, 



Mining r.nuliM'iT. 

Reno, Nev. 



EDWARDS, R. L. ( 



kilning Engineer. 

Salmon, Idaho. 



ENOS, Herbert C, 



Mining Eugluccr. 

66 Quirk Bdg., Mexico. D. F. 
Apartado 1583. 

Code: Bedford McNeil] 



EVELAND, A. J., 



Mining Engineer. 

3 Spruce St., Boston, Mass. 



EYE, Clyde M., 



Mining Engineer. 

Box 571, Ocean Park, 
Los Angeles County, Cal. 



FAIRCHILD, O. H., 

Consulting Mining nnd 
Metallurgical Engineer. 

Exam's, Reports, Mills Designed, Erected 
428 Railway Exchange Bdg.. Denver. 



FARISH, John B., 

Mining Engineer. 

25 Broad St., New York. 
603 Colorado Bdg., Denver. 
Cable: Farish. 



FEARN, Percy L., 

Mining Engineer. 

36 Wall St., New York. 



FENNELL, John Howard, 

Mining Engineer. 

'Holmer,' Slough, Bucks, 
England. 



FERRIER, W. F., 

Mining Engineer and Geologist. 

204 Lumsden Bdg.. Toronto, Ont, 
General Manager. Natural Resources 
Exploration Co.. Ltd. 



FINCH, John Wellington, 

Geologist nbd Engineer of Mines 

71 Broadway, New York. 
730 Symes Bdg., Denver. 



FINLAY, J. R., 

Mining Engineer. 

Room 802, 52 "William St., 
New York. 



FOLSOM, D. M., 

Mining Engineer. 

Stanford University. California. 



FORSTNER, William, 

Mining Engineer. 

1120 Stanyan St.. San Francisco. 
Cable: Forstner. Code: Bedford McNeill. 



MINING AND SCIENTIFIC PRESS 



July ."). 1913 



FOWLER, Edw. J., 

Metallurgist and Engineer. 

Specialty: Copper. 
Care Pacific Foundry Co"., San Francisco. 
Cable: Smelturgy. 



FOWLER, Samuel S., 

Mining Engineer and Mi-t nl lurglst. 

Nelson, British Columbia. 
Cable: Fowler. Usual Codes. 



HAGER, Dorsey, 

Geological Engineer. 

Expert on OH Production. 
431 Title Insurance Bdg.. 

Ix>s Angeles. Cal. ^ 



HALE, Alfred H., 

Mining ElcItk-it. 

Vanadium and Uranium. 
Room 24. 1643 Champa St.. Denver. Colo. 
Code: Western Union. 



HOLLIS, H. L., 

Consulting Mining Engineer 
and Metallurgist. 

1417 First National Bank Bdg.. Chicago. 



HOLLOWAY, George T., 

(Removed from Chancery Lane.) 
Offices. Laboratories and Testing Wks.. 
9-13 Emmett St., Llmehouse, London, E. 
Cable: Neolithic. Code: Bedford McNeill. 



FRASER, Lee, 

Mining Engineer. 

Apt. 168 Oruro. Bolivia. 



HALL, R. G., 

M etallurglcal and Chemical Engineer. 

Oen. Mgr. United Zinc & Chemical Co., 
Kansas City, Mo. 



HOOVER, H. C, 

Mining Engineer. 

1 London Wall Bdgs., London. E.C. 
No professional work entertained. 
Cable: Revooh, London. 



FREE, E. E. ( 

Geologliit and Chemical Engineer. 

Specialist In Potash, Salt. Soda, etc. 
Gould. Free & Ash, Chemical Engineers, 
Monadnock Bdg.. San Francisco. 



HAMILTON. E. M., 

Metallurgist. 

Specialty: Cyanlding Gold and Sliver 
Ores. 

10 Elgin Park. Redland. Bristol. Eng. 



HOOVER, Theodore J., 

Consulting Mining Engineer. 

Specialty: Flotation Concent r. Process. 

1 London Wall Bdgs., London, E.C. 
Cable: Mlldaloo. 



GAMBA, F. Pereira. 

Consulting Mining Engineer. 

Reports on Mines In Southern Colombia, 
Tuquerres. Colombia. S. A., 

via Panama y Tumaco. 



HANLON, Russell Yale 

Mining Engineer. 

Manila. P. t 
Cable: Hanlon. Code: Bedford McNeill. 



HOYLE, Charles, 

Mining Engineer. 

Apartado 8, El Oro, Mexico. 



GARREY, George H., 



Mining Geologist and Engineer. 

165 Broadway. New York. 



HARDMAN, John E., 

Consulting Mining Engineer. 

112 St. James St., Montreal. Canada. 
Cable: Hardman. Code: Bedford McNeill. 



HUBBARD, J. D., 

Metallurgical Engineer. 

Santa Clara. Cal. 



GARRISON, F. Lynwood, 

Mining Engineer. 

982 Drexel Bdg.. Philadelphia- 
Cable: Aurum. Code: Bedford McNeill. 



GEPPERT, R. M„ 



Mining Engineer. 

Salisbury House. London, E.C. 

Code: McNeill (Both Editions). 



HARTLEY, J. H., 



Mining Engineer. 

Abangarez Gold Fields de Costa Rica, 
Mlna Guacimal. 



HARVEY, F. H., 

Mining and Consulting Engineer. 

Gait, California. 



HUNT & CO., Robert W., 

Engineers. 

Bureau of Inspection, Tests A Consultation. 
Chicago-San Francisco-New York-Pittsburg. 
San Francisco office, 418 Montgomery St. 
St. Louis-Montreal-London. 

Consulting, Designing and Supervising En- 
gineers, Inspectors of Railroad. Structural 
and other Materials and Equipment. 

Chemical and Physical Laboratories. 



GOODALE, Stephen L., 

Mining Engineer. 

Professor of Metallurgy, 
University of Pittsburgh, 
Pittsburgh. Pa. 



HELLMANN, Frederick, 

Mining Engineer. 

Chuquicamata, Chile, via Antofagasta. 

519 California St., San Francisco. 
Cable: Hellmanlte. Code: Bed. McNeill. 



HUNT, Bertram, 

Broomasste Mines, Ltd. 
Brooma&sle, Gold Coast Colony, 
Via Secondoe and Tarkwa, West Africa. 



GRACE, William Frank, 

Mining Engineer. 

Gen. Mgr., Walhl Grand Junction, 
Waihi, N. Z. 
Cable: Gracefully. Usual Codes. 



HELM, J. D., 

Mining Engineer. 

Apartado 1277, Mexico, D. F. 



HUTCHINS, J. P., Mining Engineer. 

Examinations In Russia and Siberia, 
20, Galernaya, St. Petersburg. 
341, Salisbury House. London, E.C. 
Cable: Getchlns. Code: McN. (2 ed.) :W. U. 



GREENE, Fred T., 

Mining Engineer and Geologist. 

401-2-3 State Savings Bank Bdg., 
Butte. Montana. 



HENDERSON, J. A. Leo, 

M inlng Engineer find Geologist. 

Worcester House, Walbrook. 
London. E.C. 
Code: Bedford McNeill. 



JANDORF, M. L., 

Practical Mineralogist. 

Houston, Pa. 
Home Address: York. Pa. 



GRIFFITH & CO., Daniel C, 

Aiioyern, Metallurgist* and Samplers. 

8, Victoria Avenue. Blshopsgate, 
London, E.C. 
Cable: GrylTydd. Usual Codes. 



HENDRYX, Wilbur A., 

Metallurgist. 

V.P. and Gen. Mgr. Hendryx Cyanide 
Machy. Co.. 107-109 William St., N. Y. 
Cable: Henelecy. 



JANIN, Charles, 

Mining Engineer. 

620 Kohl Bdg., San Francisco. 
Cable: Charjan. Code: Bedford McNeill. 



GRIFFITH & CO., T. R., 

Const ruction. Metallurgical and 

CoilMUltlUg EUKlllt'tTN. 

410-417 Central Savings Bank Bdg, 
Denver. Colo. 



HERZIG, Charles C, 

Engineer of Mines. 

412-419 Salisbury House, 
London. E.C. 



JENKS, Arthur W., 

Mining Engineer and Metallurgist. 

Care Banco Anglo-Sud Americano, 
Buenos Aires. Argentine Republic. 



GROTHE & CARTER, bSGSS". 

Patented System of Pulp Agitation. 
Latest Improvements. 
2a San Agustln 53. P. O. Box 2554, 
Mexico. D. F. 



HILLS & WILLIS, 

Victor G. Hills. Prank G. Willis. 

Mining Engineer.. 

Cripple Creek. 318 MePhee Bdg., Denver. 
Cable: Hillwlll. Usual Codes. 



JENNINGS, E. P., 

Mining Engineer. 

Salt Lake City, Utah. 
Cable: Chalcocite. Salt Lake. 
Code: Bedford McNeill. 



GRUNSKY, C. E., Jr., 

Mining Engineer. 

Supt. Standard Consolidated Mining Co., 

Bodle. Mono County, Cal. 
57 Post St.. San Francisco. 



HOFFMANN, Ross B., 

Mining Engineer. 

First Nat. Bank Bdg., Oakland, Cal. 
Cable: Rosshof. 



JOHNSON, Harry R., 

Consulting Geologist. 

Petroleum, Water Supply. 
805 H. W. Hellman Bdg., Los Angeles. 
i '.-i.H p : Jriin-t. Usual Codes, 



HAGGOTT, Ernest A., 



Mining Engineer. 

2525 West 18th Street, 
Los Angeles. Cal. 



HOLLAND, L. F. S., 

Mining Engineer and Metallurgist. 

Superintendent of Mines, 
Smuggler-Union Mining Co., 
Smuggler. Cnlo. 



JOHNSON, M. M., 

Mining Engineer. 

1008 Newhouse Building. 
Salt Lake City. Utah. 



July ."). 1913 



MINING AND SCIENTIFIC PRESS 





JOHNSON & SONS, wSkTltd! 

Ilullluu It r Hurra anil n llurgUl a. 

S7-SJ f'aul St., Flnsbury. London, E. C 
Cable: Cau tenant. 




LEVY, Ernest, 

Mining I "k 1 1>- i-r. 
Representing Alex. Mill A Stewart, 
Konaland. British Columbia. 
Cable: Truculent. Code: Heilfnrd McNeill 




MERRILL, Charles W., 

Metallurgist. 

121 Second St., San Francisco. 
Cable: Luroo. Codes: Bedford McNeill 
ii ml M.ireltiK A N--.il 



JONES, Henry Ewer, 

Mining I i ' . . I n ■ ■ r 

Parliament Mansions. Victoria St., 
Westminster. London. S. W. 
>'uti|.- I'w ■ ■ s . Hi -.■■uniiiti in Imp. 



LEWIS, H. Allman, 

MtiunittiiK HnKlnrrr. 

The Berenguola Tin Minus, Ltd., Bolivia. 

Address: care Glbbs & Co., Oruro. 
M,-N..||| ( urns) 



MERRILL, Frederick J. H., 

Mining Kllglnrrr nttil I<> g 1. ( 

(Lata State Geologist of New York.) 
624 Cltlcens Bank Bdg,, 

I.HH AtlK'-l'-l*. <'ul 



KEFFER, Frederic, 

Ml nine; Engineer. 

and Acting General Manager for 
The British Columbia Copper Co.. Ltd. 
Greenwood. B. C. 



LINDBERG, Carl 0. t 



(With W. Rowlnnd Cox.) 

Mining I 1 1 : i 1 1 1 i r . 

Mines Examined a; 1 Reported Upon. 
16"» Broadway, Ni-w York. 



MICHELL, Geo. V., 

mi I. i iiv. Engineer. 
Specialty: Placer Mining 
16 Great St. Helens, 

London. B.C. 



KEHOE, Henry, 

11 Inline Kniclneer. 

Mine Examinations. Development. 
Management. 

W2?. S Wall St. Spokane. \Vnsh. 



LIVINGSTON & STEWART, 

D. C. Livingston. C. A. Stewart. 

Mining Engineer* nnd GeologlMtn. 

Examinations, Reports, Surveys, Maps. 
Moscow. Idaho. 



MILLER, Bernard P., 

Mining Engineer. 

63% Sixth St., Portland, Oregon. 



KERR, Mark B., 

Consulting Engineer. 

626 Mills Brig.. San Francisco, Cal. 



KINNON, Wm. H., 

Mining Engineer nnd Metallurgist. 

Lordsburg, N. M. 



KIRBY, A. G., 

Metallurgist. 

Mill Designing and Construction. 
Specialty: Concentration & Cyanldation. 
Dominion Red. Co.. Cobalt. Ont. 



KIRBY, Edmund B., 

Mining Engineer nud Metallurgist. 

701 Security Bdg.. St. Louis. 
Specialty: The expert examination of 
mines and metallurgical enterprises. 



KRUMB, Henry, 

Mining Engineer. 

Felt Bdg.. Salt Lake City. Utah. 



KUEHN, A. F., 

Consulting Mining Engineer. 

1 London Wall Buildings, 
London E.C. 
<"able: Norlte. 



LAKENAN, C. B., 

Mining Engineer. 

Ely, Nevada. 



LAMB, Mark R., 

Equipper. 

Mgr. Allis-Chalmers Co., 
Santiago, Chile. 



LAMB, R. B., 

Mining Engineer and Metallurgist. 

Traders Bank Bdg., 
Toronto, Ontario, Canada. 



LANAGAN, W. H., 

Mining Engineer. 

1067 Monadnock Bdg., San Francisco. 

Code: Bedford McNeill. 



LEFEVRE, Henry F., 

Mining Engineer. 

71 Broadway, New York. 
Cable: Quique. Code: Bedford McNeill. 



LEGGETT, Thos. H., 

Consulting Mining Engineer, 

165 Broadway, New York City. 
Cable: Tomleg. 



LLOYD, R. L., 

Metnllnrglcnl Engineer. 

Specialty: Pyro Metallurgy of Copper 
and Associated Metals. Cable: Rlcloy. 
Cnde: McX.-lll. 'J Broadway. N. Y. 



LOR AM, S. H., 

Mining nnd Metallurgical Engineer. 

Care Messrs. Gibbs & Co., 
Valparaiso. Chile, S. A. 
Cable: Loram, Usual Codes. 



Bewick, Morning & Co. 

LORING, E. A., 

Mining Engineer. 

62, London Wall, London, E.C. 
Cable: Ring-In, Usual Codes. 



LORING, Frank C, 

Mining Engineer. 

Home Life Building, Toronto, Ontario. 



LORING, W. J., 

Mining Engineer. 

62, London "Wall, London, E.C. 
Cable: Wantoness. Usual Codes. 



MACNUTT, C. H., 

Mining Engineer. 

Care The Anglo South American 

Bank, Ltd., 
Old Broad Street. London. E.C. 



MALCOLMSON, Jas. W., 

Consulting Engineer. 

1012 Baltimore Avenue, 
Kansas City, Mo. 



MARSTERS, V. F., 

Consulting Geologist. 

San Juancito, Honduras, C. A. 



McKIM, J. W., 

Mining Engineer. 

632 Dooly Block, Salt Lake, Utah. 



Mclaughlin, r. p., 

Consulting Geologist nnd Engineer. 

OH and Metal Mining. 
818 Mills Bdg., San Francisco. 
Cable: Roylaugh. 



MERCER, John W., 

Mining Engineer. 

Gen. Mgr. South American Mines Co. 
Mills Bdg., Broad St., New Tork. 



MERRICKS, CRANE & CO., 

Frank Merricks. G. Allen Crane. 
5 & 6 Great Winchester Street, 
London, E.C. 
Cable: Docimology. Code: Bed. McNeill. 



MINARD, Frederick H., 

Mining Engineer. 

Trinity Bdg., Ill Broadway, New York. 
Cable: Frednard. Code: McNeill 



MINES MANAGEMENT CO., 

Consulting Mining Engineers and 
Mine ManugerM. 

60 Broadway, New York City. 
Branches: 
London, England. 
28 and 29 St. Swithlns Lane. 
Mexico, D. F., 
Avenida 16 de Septiembre, Num. 48. 
Cable: Minmanco. Code: Bed. McNeill 



MORRIS, F. L., 

Mining Engineer. 

1057 -Monadnock Bdg., San Francisco. 
Cable: Fredmor. Code: Bedford McNeill. 



MUDD, Seeley W., 

Mining Engineer. 

1001-2 Central Bdg., Los Angeles, Cal. 

Code: Bedford McNeill. 



MUNRO, C. H., 

Mining Engineer. 

Monadnock Bdg., San Francisco. 
Cable: Ornum, Code: Bedford McNeill. 



MYERS, Desaix B., 

Mining Engineer. 

321 Story Bdg., Los Angeles, Cal. 
Philadelphia Address: 1521 Spruce St. 



NAHL, Arthur C, 

Mining Engineer. 

Trlunfo, Baja California, Mexico. 



NEILL, James W., 

Metallurgist nnd Mining Engineer 

159 Pierpont St., Salt Lake, Utah. 
Pasadena, Cal. 



NEWMAN & BEALS, 

M. A. Newman. R. L. Beals. 

Mining and Metnllnrglcnl Engineers. 

839 Mills Bdg., San Francisco. 
Code: Bedford McNeill. 



NICHOLS, Horace G„ 

Mining Engineer, 

840, Salisbury House, London, E.C. 



NOYES, William S., 

Mining Engineer. 

819 Mills Building, San Francisco. 



24 



MINING AND SCIENTIFIC PRESS 



July 5. 1913 



£P ro £oss i o n ci f <D i roc ho r\y 



OGLESBY, John S., 

Mine Accounting. Audits, Appraisals, 
Valuatlonji. 

Dallas, Texas. 



OLCOTT & CORNING, 

(E. E. Olcutt. C. R. Corning.) 
Mining and Metallurgical Engineers. 

36 Wall St., New York. 



OLDFIELD, Frank W., 

Mining Engineer. 

Mexican Mines Co. 
Bolanos. Jall&co, Mexico. 



OSMONT. Vance C, 

Mining Engineer. 

of Daniels & Osmont, Inc. 
Civil, Hyd. and Mining Engineers. 
lQsr. Mona-lnock BOc, San Francisco. 



PAUL, w. H., 

Mining Engineer. 

General Manager Dolores Mines Co. 
Madera. Chihuahua. Mexico. 



PAWLE & BRELICH, eSK^m. 

(Reginald Pawle. Henry Brellch.) 
Balfour House, Finsbury Pavement, 
London, E. C. 
Cable: Plntnons. Cod--- Bedford McNpIH. 



PAYNE & CO., F. W., 

Dredging Engineers. 

82. London Wall. London, E. C. 
Cable: Payndredge. Code: Bed. McNeill. 



PEARSE, KINGSTON & BROWNE, 

Consulting Mining Engineers. 

Worcester House, Walbrook, London, 
and 35 Wall St., New York. 
Cablf: Undermined. Usual Codes. 



PERKINS, Walter G, & Co., 

Metallurgical Engineer. 

62. London Wall. 
London, E. C. England. 



PERRY, 0. B., 

Mining Engineer. 

165 Broadway, New York. 



PICKARD, Byron 0., 

Engineer of Mines. 

406 Fleming Block, 

Phoenix, Arizona. 



P0ILL0N & POIRIER, 

Howard Polllon. C. H. Polrler. 

Mining Engineers. 

63 Wall St.. New York City. 



POLLAK COMPANY, THE A. J., 

Consulting Petroleum Engineers. 

California OH Properties. 
Mills Building, San Francisco. 
Cable: Petreng. Usual Codes. 



POLSON, W. L., 

Mining Engineer and Aasayer. 

Examinations and Reports. 
Ketchikan, Alaska. 



P0MER0Y, Wm. A., 

Mining Engineer. 

66 Wall Street, New York. 



PRICHARD, W. A., 

Consulting Mining Engineer. 

lone, Cal. 



PRISK, Thomas H. 

Mining Engineer. 

St. Agnes, Cornwall. 



PROBERT, Frank H., 

Consulting Engineer and Mining 
Geologist. 

Central Bdg., Los Angeles, Cal. 
CahiP: probert. Code: McNeill. 



PURINGTON, Chester W., 

Mining Engineer. 

62. London Wall, London, E ,C. 
Cable: Olenek. Usual Codes. 



QUENEAU, A. L., 

Metallurgical Engineer. 

Zinc Smelting and Electrometallurgy. 

Jemeppe sur Meuse, Belgium. 
Cable: Aljonak. 929 Chestnut St.. Phlla. 



RADFORD, William H., 

Alluvial Mining. 

2360 Broadway, San Francisco. 
Cable: Bandan. 



RAINSFORD, R. S., 

Mining Engineer. 

Manager Argonaut Mining Co. 
Jackson, Amador County. California. 



RAYMOND, Robert M., 

Mining Engineer. 

The Exploration Co. of England and 
Mexico, Ltd. Mutual Life Bdg. No. 623. 
Mexico, D. F. 



RAYMOND, Rossiter W., 

Mining Engineer and Metallurgist. 

29 W. 39th St., New York. P. O. Box 223. 



REID, John T., 

Mining and Consulting Engineer. 

Specialty: Copper Mines. 
Lovelock, Nevada. 
Cable: Reld. Code: Bedford McNeill. 



REID, Walter L., 

Supt. Smuggler-Union Cyanide Plant. 
Tests, Design and Construction. 
P. O. Box 471, Tellurlde, Colo. 



REVETT, Ben Stanley, 

Mining Engineer. 

Alluvial Mining and Installations. 
Breckenrldge, Colorado. 



RICHARDS. Robert H., 

Ore Dressing. 

Make careful concentrating tests for the 
design of flow sheets for difficult ores. 
491 Boylston St ..Boston. Mass. 



RICKARD, Edgar, 

Business Manager 
The Mining Magazine. 
819, Salisbury House, London, E. C. 
Cable :Qligoclase. Code:Bedford McNeill. 



RICKARD, Forbes, 

Mining Engineer. 

Equitable Building, Denver. 



RICKARD, T. A., 

Edltcr. The Mining Magazine. 
819, Sal ibury House. London, E. C. 
No professional work undertaken. 
Cable iQiit-oclase. Code :Bed ford McNeill. 



RICKETTS & BANKS, 

Mining Engineers and Metallurgists. 

80 Maiden Lane, New York. 
(See also our card under 'Ore Testing 
Works.' second page following.) 



RIORDAN, D. M., 

Consulting Engineer. 

Mining Investigations carefully made 
for responsible intending Investors. 
165 Broadway. New York. 



ROGERS, Allen Hastings, 

ConNUltlng Mining Engineer. 

201 Devonshire St., Boston Mass. 
71 Broadway, New York, N. Y. 
Cable: Alhasters. 



ROGERS, Edwin M., 

Consulting Mining Engineer. 

32 Broadway, New York. 
Cable: Emrog. Code: Bedford McNeill. 



ROMER, B. F. P., 

Mining Engineer. 

2 Sophlapleln, Amsterdam, Holland. 
Cable: Remor. Code: ABC. 6th Ed. 



ROSS, G. McM., 

Mining and Consulting Engineer. 

Yosemlte Club, Stockton. California. 



ROSS, John, Jr., 

Mining and Consulting Engineer. 

Sutter Creek. California. 



ROTHERHAM, G. H., 

Metallurgist. 

City Deep. Ltd. 
P. O. Box 1411. Johannesburg. 
South Africa. 



ROYER, Frank W., 

Mining Engineer. 

Mutual Life Bdg. Mexico. D.F. 
Union League Bdg., Los Angeles. 
Cable: Royo. Code: Bedford McNeill 



SAMWELL, N., 

Mining Engineer. 

P.O. Box 385, Rangoon, Burma. 
Cable: Minemet. Usual Codes. 



SCOTT, Robert, 

Inventor and Builder of the 
Scott Quicksilver Furnace. 

498 S. Eleventh St., 
San Jose. California. 



SEARS, Stanley C, 

Mining Engineer. 

General Manager, Utah-Apex Mining Co. 
Bingham Canyon, Utah. 



SHARPLESS, Fredk F., 

Consulting Mining Engineer* 

52 Broadway, New York. 
Cable: Fresharp. Code: McNeill. 



SHAW, S. F., 

Mining Engineer. 

Supt. American Smelting & Refining Co. 

Charcas, San Luis Potosi. 
Mexico. 



SLMONDS, Ernest H., 

Metallurgical Engineer. 

1105 Crocker Bdg., San Francisco. 



SLMONDS & BURNS, 

Mining Engineer. 

55 Liberty St.. New York. 



SIMPSON, W. E., 

Mining and Metallurgical Engineer. 

Fundiclon de Los Arcos, Toluca, 
Mexico. 

Cable: Metalmlner. Code: Bpd McNeil] 



July 5. IBM 



MINING AND SCIENTIFIC PRESS 




SIZER. F. L., 



t un«ulllu« Mining Kmlnrrr. 

»1S First Ntt'l Bank Bdg.. 
San Franc loco. 



BYMMES. Whitman, 

Mining Knglnrrr. 

Mitr. Mexican Mine, etc. 
Virginia City, Nevada. 



WEATHERBE, D'Arcy, 

M 1 ii In is KiiKlnrrr. 

62. London Wall. London, E.C. 
Cabin: Baaera. Code: McNeill, both Ed. 



SMITH, Howard D , 

Mlplnc Kuilor^r. 

Crocker Bd(., San Franclaco. 
Cable: Dlorlte. Code: Weatern Union. 



Itnlnbrldge, Seymour A Co. 

TEALE, J. W., 

H I nl n K I - 1 . I ii • ■ - r 

Sallabury House, London, E.C 
Pjghlg Baagra. UMial Codaa. 



WEBBER, Morton, 

M I in- \ n I mil Inn n ml I tr\ rlopmrut. 

2 Rector St, New York. 
Cable: OrrhiickM. 



SMITH, J. D. Audley, 

Mining I iii.hn . r 

P. O. Box 1557. 9. Bridge St.. 
Sydney. Australia. 
Cable: Jadunand. Ml Cogj| 



THOM, Robert, 



Mining I :iitlnr.T. 

Sonora. Tuolumt.e County, Cat. 
Phone: Main 563. Code: Morelng tt Neal. 



WENSTROM, Olof, 



Copper. 



Mining Knulnrrr. 

1692 Beacon St.. Brookllne. Mass. 
Cable: Olaro. Code: Bedford McNeill 



8MITH, Reuben Edward, 

Mining Engineer. 

Care of C. L. Smith. 
Vladivostok. Siberia. 
Cable: Resmlth. Code: McNeill. 190S 



THORNE. W. E., 



MlnliiK Engineer. 

Bodaibo (Irkoutsk), Russia, 

Code: McNeill. 1908 



Cable: Wethorne. 



WESTERVELT, William Young. 

Conaultlng Mining Enalurer. 

17 Madison Ave. (Madison Square East) 

New York. 
Cable: "asewest. ('<h|i-; M--ilfnr<l MfWlll 



SMITH & ZIESMER, 

(Franklin W. Smith. Ralph A. Zlesmer.) 
Coasnltlng Mining Engineers. 

Work In Mexico a Specialty. 
Bluhee. Arlx. Code: Bedford McNeill 



THURSTON, E. Coppee, 

Mining Engineer. 

Care of A. Goerz & Co., 
Pinners Hall. Austin Friars, 
London. E.C, 



WILKINSON, C. D., 

Mining Engineer. 

Care of Geo. Wlngfleld. 
Goldfleld. Nevada. 



SPAULDING. C. F., 

Mining Engineer nnd Metallurgist. 

Oregon City, Oregon. 



TIMMONS, Colin, 

437 LW. Hellman Bdg., Los Angeles. Cal. 
Specialty: Examination of mining prop- 
erties In Latin-American countries. 



WILMOT, H. C, 

Mining Engineer. 

Care Colorado Mining Co., 
Aroroy, Masbate, P. I. 



8PILSBURY, E. Gybbon, 

Coaaalllng, Mlnlns and Metallurgical 
Engineer. 

45 Broadway. New York. 
i"able: Spllroe. 



TITCOMB, H. A., 

Salisbury House, 
London. E.C. 
Cable: Tltcomb. Code: Bedford McNeill 
(two editions). 



WINCHELL, Horace V., 

Consulting Geologist Amalg. Copper Co., 

605 Palace Bdg., Minneapolis, Minn. 
Cable: Racewln. 



SPURR, J. Edward, 

Mining; Geologist. 

Bullitt Bdg., Philadelphia. Pa. 
Tonopah Mining Company of Nevada. 



TOLL, Rensselaer H., 

Mining Engineer. 

410 Boston Bdg., Denver. 
Cable: Rentoll. Code: Bedford McNeill. 



WINWOOD, Job H. f 

Mining Engineer. 

210-11 Continental Bank Bdg., 
Salt Lake City, Utah. 
Code: Bedford McNeill. 



8TANFORD, Richard B., 

Mining Engineer. 

Cape Graclas, Nicaragua, C. A. 
Manager The Bonanza Mine, 
Cable: Stanford. Code: Bedford McNeill. 



TOLMAN, Cyrus Fisher, Jr., ' 

Consulting Economic Geologist. 

P. O. Address: 
Stanford University, Cal. 



WISEMAN, Philip, 



Mining Engineer. 

1008-9 Central Bdg., Los Angeles, Cal. 

Codes: Western Union; Bed. McNeill. 
Cable: Fllwiseman. 



STEBBINS, Elwyn W., 

Mining Engineer. 

819 Mills Bdg.. San Francisco. 



TURNER, H. W., 

Mining Geologist. 

708 Mills Bdg., San Francisco. 
62 London Wall, London. 
Cable: Latite. Code: Bedford McNeill. 



WOLF, J. H. G., 

Manager North American 
Exploration Co. 
1023 Mills Bdg.. San Francisco. 



8TEVENS, Blarney, 

Engineer nnd Manager. 

8a Merlda 152 A. Mexico City, 
Mexico. 



TURNER, Scott, 

Mining Engineer. 

Tromso, Norway. 
Cable: Arctlccoal. Code: McNeill, 1908. 



WORCESTER, S. A., 

Mechanical Mining Engineer. 
Mill Tests, Design, Construction, Man- 
agement. Special Ore-handling Plants. 
Victor. Colorado. 



8TINES, Norman C., 



Mining 
Engineer. 

Polefskoy, Mramorskaya Station, 
Perm Government, Russia. 
Cable: Normstines, Ekaterlnberg. 

Code: Bedford McNeill (both editions). 



TWEEDY, Geo. A., 

Mining Engineer. 

Rosario, Slnaloa, Mexico. 
Gen. Mgr. Minas del Tajo, Rosario. 
Mexican Mines Co.. Bolanos. Jalisco. Mex. 



WRIGHT, Charles Will, 

Mining Engineer. 

Ingurtosu,' Sardinia, Italy. 
Cable: Wright, Arbus. Code:Bed.McNelll. 



8TOCKFELD, G. A., 

Consulting Engineer. 

Egypt House, 36-38 New Broad St., 
London, E. C. 



STORMS, William H., 

Mining Geologist and Engineer. 

Mining Methods a Specialty. 
2437 Hllgard Ave., Berkeley, Cal. 



STRAUSS, Lester W., 

Engineer of Mines. 

Apartado 1227, Lima. Peru. S. A. 
Cable: Lestra-Llma. Code: Bed. McNeill. 



SUSSMAN, Otto, 

Kilning Engineer. 

52 Broadway, New York. 



VALLENTINE, E. J., 

Mining Engineer. 

Rahman Tin Co., Intan, Upper Perak, 
Malay States. 
Code: McNeill (1908 edition). 



VEATCH & ANDERSON, 

Consulting Geologists. 

53, New Broad St., London, E.C. 
Cable: Veatchac. Code: Bedford McNeill 



VON ROSENBERG, Leo, 

Consulting Mining Engineer. 

42 Broadway, New York. 
Cable: Porphyry. 



WARWICK, A. W., 



Mining Engineer. 

20S McPhee Building, Denver. 
Choix, Slnaloa, Mexico. 

Code: Bedford McNeill. 



WRIGHT, Louis A., 

Mining Engineer. 

814 Mills Bdg., El Paso, Texas. 

Code: Bedford McNeill. 



YEATMAN, Pope, 

Mining Engineer. 

166 Broadway, New York. 
Cable: Ikona. Code: Bedford McNeill. 



YORK, GRANT & COMPANY, 

Mining, Electrical and Civil Engineers. 
Mining investigations and contracts un- 
dertaken. Special Mexican experience. 
38-40 McGraw Bdg.. Pr*rolt. Mich. 



YOUNG, James S., 

Mining and Metallurgical Engineer. 

Casllla 41. Iquique, Chill; or Casilla 788, 
Lima, Peru. Cable: Perthshire. 

Codes: Lieber: Bed. McNeill HHPS' 



-6 



MINING AND SCIENTIFIC PRESS 



July 5. 191? 



ASSAYERS. CHEMISTS AND ORE TESTING WORKS. 



Irving & Co., James. 
Jamea Co.. The Geo. A. 
Luckhardt Co., C. A 
Perez. Richard A. 
Smith. Emery & Co. 
Twining Laboratories, 
The. 

COLORADO. 

Burton, Howard E. 



Frost. Oscar J. 
Richards, J. W. 
Warner. Hayward D. 
Wood & Co.. Henry E. 

NEVADA. 
Young, H. W. 

\EW JERSEY. 

Ely, E., Dover Labora- 
tory. 



NEW YORK. 

Ledoux & Co., Inc. 
Rlcketts & Banks. 

PENNSYLVANIA. 
Petrologlcal Laboratory. 

TEXAS. 
Crltchett & Ferguson. 
Hfcuber, M., Jr. 



UTAH. 

Bardwell, Alonzo F. 
Bird-Cowan Co. 
General Engineering Co.. 
The. 

Officer & Co.. R. H. 
Union Assay Office, Inc 



CALIFORNIA ORE TESTING CO., w. geiger. Mgr. 

THE MOST COMPLETE ORE TESTING PLANT IN THE WEST. 

All tests conducted under experienced supervision. Write for booklet. 
Office: 630 Sacramento St. Testing Plant: 591 Bay St., San Francisco. 



GENERAL ENGINEERING CO., THE, 

CONSULTING ENGINEERS. 
159 Plerpont Avenue. Salt Lake. Utah. 
Design and Erection of all Classes of Reduction Plants. 
ORES TESTED IN SMALL OR CARLOAD LOTS BY AMALGAMATION. CON- 
CENTRATION. CYANIDATION, MAGNETIC SEPARATION. MACQUISTEN TUBES. 
Send for our ORE TESTING BULLETIN. 



GEORGE A. JAMES CO., THE, 

ASSAYERS AND CHEMISTS. 

Supervision of Ore Sampling, Technical Analyses, Cement Testing. 
No. 28-32 Belden Place (off Bush near Kearny). San Francisco. 



LEDOUX & CO., Inc., 

ASSAYERS, CHEMISTS AND METALLURGISTS. 

Independent Samplers at the port of New York. 
Representatives at all Refineries and Smelters on Atlantic Seaboard. 
Office and Laboratory: 99 John Street. New York. 



C. A. LUCKHARDT CO., 

(A. H. Ward. Harold C. Ward.) 

ASSAYERS AND CHEMISTS. 
Sampling of Ores at Smelters. 53 Stevenson St.. San Francisco. 



Telephone, Kearny 5951: 



SMITH, EMERY & CO., (Ore Testing Plant, Los Angeles.) 

INDEPENDENT CONTROL AND UMPIRE ASSAYERS. 

Represent Shippers at Smelters. Test Ores, and Design Mills. 
651 Howard Street, San Francisco. 245 So. Los Angeles Street, Los Angeles. 



ALA sk \. 
Drury, L. M. 

CALIFORNIA. 

Atkins & McRae. 
California Ore Test- 
ing Co. 
Baverstock & Staples. 
Gibson. Walter L. 
Hanks, Abbot A. 



ATKIN & McRAE, 

AsaayerB, Chemists, and Metallurgists. 
Control and Umpire Aaaaya. 

Careful Analytical Chemists. 
616 South Olive St., Los Angeles. Cal. 



BARDWELL, Alonzo F., 

(Successor to Bettles & Bardwell.) 
Caatom Aaaayer nnd Chemlat. 

158 S. W. Temple St. Salt Lake, Utah. 
Ore Shippers' Agent, 



BAVERSTOCK & STAPLES, 

Annlytlcnl Chemlat* nnd Metallurgist*. 

223 W. First St., Los Angeles, Cal. 
Technical Examination of Minerals and 
Organic Products. Assaying. 



BIRD-COWAN CO., 

Custom Annnyeni nnd Chemists. 

(Frank A. Bird. Charles S. Cowan.) 
Agents for Ore Shippers. 
160 S. W. Temple St.. Salt Lake. Utah. 



BURTON, Howard E., A ^ m r i."" d 

111 E. Fourth St., Leadvllle. Colorado. 
Specimen Prices: Gold. 50c; Gold and 
Sliver, 75c: Gold. Silver and Lead. $1; 
Gold. Silver and Copper. >1.50. 



CRITCHETT & FERGUSON, 

Aaaayera and Cbemlata. 

El Paso, Texas. 
Umpire and Controls a Specialty. 



DRURY, L. M., 

Tanana Aaany Office. 

Fairbanks, Alaska. 



ELY, E., Dover Laboratory, 

Aaaayer and Chemlat. Fees: Gold, 60c; 
Silver, 45c; Copper, $1; Iron Ores, Iron, 
$1; Phosphorus, $1.50; Sulphur, $1.75. 
S::-.^ K. M.'Kitrlan St., Dover. N. J. 



FROST, Oscar J., 

Aasayer. 

611 18th St.. Denver. 



GIBSON, Walter L., 

Successor to 
Falkenno Aaanylng Co.. 
Aaaay Office and Aaalytlcal Laboratory, 
School of Aaaaylng. 

824 Washington St.. Oakland. 
Phone S929. 
Umpire assays and supervision of sam- 
pling. Working teats of ores, analyses. 
Investigations of metallurgical and 
technical processes. 

Professor L. Falkenau, General Man- 
ager and Consulting Specialist. 



HANKS, Abbot A., 

Chemlat and* Aaaayer. 

Established 1866. 
630 Sacramento St., San Francisco. 
Control and Umpire Assays, Supervision 

of Sampling at Smelters. 
Cable: Hanx. Code: W. U. and Bed. McN. 



HAUBER, M., Jr., 

Chemist and Aaaayer. 

Control and Umpire Assays. 
Agent for Ore Shippers. 
305 N. Stanton St.. El Paso, Texas. 



IRVING & CO., James, 

Gold Reflnera nnd Aaaayera. 

107 N. Spring St., Los Angeles, CaL 
Cash for Bullion and Ores. 



OFFICER & CO., R. H., 

Aasayera nod Chemists. 

169 South West Temple Street. 
Salt Lake. Utah. 



PEREZ, Richard A., 

Assayer, Chemist and Metallurgist. 

(Established 1895.) 
120 N. Main Street. Los Angeles, Cal. 



PETROLOGICAL LABORATORY 

W. Harold Tomllnaon, 

Swathmore, Pa. 
Petrographlc Work. Rock sections made. 
Microscopic examinations of rocks. 



RICHARDS, J. W., 

Aaaayer and Chemlat. 

1118 Nineteenth St., Denver. 
Ore Shippers' Agent. Write for terms. 
Representatives at all Colorado smelters. 



RICKETTS & BANKS, 

80 Maiden Lane, New Tork. 
Complete ore testing plant. Best 
method of treatment determined. Car- 
load or smaller lots. 



TWINING LABORATORIES, THE, 

Snnltnry, Chemical, and Bacteriological. 
Aaaayera and Metallurgist*. 

Fresno, Cal. 



UNION ASSAY OFFICE, Inc., 

Assayera and Chemists. 

Box 1446, Salt Lake. Utah. 



WOOD & CO., Henry E., 

Aaaayera. 

1734 Arapahoe St.. Denver. 
Ores tested In carload lots. Amalga- 
mation, concentration, cyanide, Wether- 
ell magnetic separator. Blake electric 
separator. Send for circular. 



YOUNG, H. W., 

Chemlat and Aaaayer. 

Prompt attention to samples by mall. 
Box 348, Reno. Nev. 



A. VAN DER NAILLEN SCHOOL "m^&l" ™ 

Established in 1867 
L2 months coarse in PRACTICAL ENGINEERING. 

Mining. Mechanical. Civil or Electrical. 
Send for catalogue. 



COLORADO SCHOOL OF MINES 

Established 1874. Victor C. Alderson. Pres. Complete 
courses In Metal Mining. Coal Mining. Metallurgy, Mining 
Geology. Catalogue on request. Golden, Colo. 



MISSOURI SCHOOL OF MINES 

A department of the University of Missouri. Established 
In 1871. Four-year courses In Mining Engineering, Met- 
allurgy, Civil Engineering, General Science. 

L. E. Young, Director. Rolla, Missouri. 



HEALD'S SCHOOL OF MINES Estab.ises 

425 McAllister St., San Franclaco 
PRACTICAL TWO YEAR. COURSE. IN MINING 

Special work may be taken in Assaying, Cyanidlng, Metal- 
lurgy, Drafting, Surveying, and General Engineering. 
For Information nddreaa C. E. HEALD, Aaa't. Supf. 



MICHIGAN COLLEGE OF MINES 



F. W. McNalr, President. Located In the Lake Superior 
district. For Year Book and Booklet of Views apply to 
President or Secretary, Houghton, Michigan. 



UNIVERSITY OF ILLINOIS 

Department of Mining Engineering. Complete ore con- 
centration, coal was-hing, drilling and blasting labora- 
tories Just completed. Fully equipped mine rescue sta- 
tion. Address Dept. Mining Engineering, Urbana, Illinois. 



July 5, 1!>13 



MINING AND SCIENTIFIC PRESS 



27 



The Braun Planetary Pulverizer 




I'ATKST APl'LIKD FOB. 



is an improvement over the regular 
Braun Pulverizer, as it is capable of 
grinding various classes of material 
whether hard, soft, or talcy. 

If you have experienced trouble in 
pulverizing your ores, you should give 
this machine your consideration. It 
has satisfactorily ground such material 
as phosphate rock, ammonia salts, etc., 
as fine as 200 mesh with one grinding. 



As Easily Cleaned as the Regular Braun Pulverizer 



Equipped with a substantial planetary movement that is warranted to last indefinitely. 
No expensive parts to be replaced. Grinding discs are renewable. 

Send lor Catalog F»S. 




WRITE YOUR 
NEAREST HOUSE 



BRAUN CORPORATION 



HA\ FRANrlSCO, U. S. A. 



LOS ANGELES U.S.A.. 



^ Mining a** Cyanide Plant Equipment 



Settling, Clarifying, Agitating and 
Leaching Tanks 

All Sizes and Dimensions, Made from Best Quality of California 
Redwood. For Prices and Information, address department T 

Redwood Manufacturers Company 

Kohl Bldg., San Francisco 



THE WIZARD ROCK DRILL 

willi its ACCELERATING PISTON and CORLISS VALVE has demonstrated to the 
satisfaction of Miners, Quarrymen and Contractors, its ability to drill more ground with less 
cost for power and maintenance than any other piston drill now made. 

Make it your duty to investigate the WIZARD before you place your next order. 

A descriptive bulletin, with some unbiased opinions from users of WIZARD ROCK 
DRILLS will be sent on request. Write for it. 




McKIERNAN-TERRY DRILL CO. 



232 BROADWAY, NEW YORK, N. Y. 

Canadian Representatives : Canada Foundry Co., Ltd., Toronto, Ont. 



HAMMER DRILLS 



CORE DRILLS 



SHEET PILE HAMMERS 



ATLAS JACKS 



38 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 



THE CONSOLIDATED 
MINING AND SMELTING 

Co. of Canada, Ltd. 

Smelters and Refiners. Pur- 
chasers of all classes of Ores. 
Producers of Fine Gold and 
Silver, Base Bullion, Copper 
Matte, Pig Lead, Lead Pipe, 
Bluestone and Electrolytic 
Bearing Metal 

Offices, Smelting and Refining Dept., Trail, British Columbia 

L. Vogelstein & Co. 

42 BROADWAY, NEW YORK 

GENERAL AGENTS 

United States Metals Refining Co. 

Chrome, N. J., and Graselli, Ind. 
ELECTROLYTIC COPPER AND LEAD REFINERS. 



SOLE AGENTS FOB 

SPELTER OF AMERICAN ZINC LEAD ft SMELTING CO. 

Smelters at Caney, Kan., and Dearing, Kan. 



WILDBERG BROS. 

Smclteri. Refiners and Purchasers of 

GOLD and SILVER ORES, GOLD DUST, BULLION 
and NATIVE PLATINUM 

Producers ol Proof Gold and Silver lor Aasayers 
OFFICE 416-419 PACIFIC BLDG. SAN FRANCISCO. 



Attractive Terms Offered for 

Gold Silicious Ores 

THE MOUNTAIN COPPER CO., Ltd. 

332 Pine Street, San Francisco, Cal. 



The American Metal Company, Ltd. 

52 BROADWAY, NEW YORK 

Branch Offices: 
St. Louis, Mo. Denver, Colo. 

1411 Third National Building 825 A. C Poster Building 

Ores and Mattes Copper and Lead Bullion 

Mexican Representatives: Companla de Mlnerales y Metalea, 
Mexico City and Monterrey. 



SWANSEA CONSOLIDATED GOLD AND 
COPPER MINING COMPANY 

of 

SWANSEA, ARIZONA 

is now prepared to receive for purchase all varieties of copper 
ores, and will be pleased to answer all enquiries for rates 
Address : ORE DEPARTMENT, Swansea, Ariz. 



SELBY SMELTING & LEAD GO. 

SMELTERS AND REFINERS 

BUYERS OF 

Gold, SiPver and Lead Ores, Concentrates, Cyanide 
Product, etc.. Lead Bullion, Dore Bars, Gold n U st 
and Bullion. 

CONSIGN ALL SHIPMENTS TO SELBY, CAL. 

Assaying of hand samples has been discontinued. 

GENERAL OFFICES: 

MERCHANTS EXCHANGE BDG.. SAN FRANCISCO. 

EIGHTH FLOOR 



International Smelting & 
Refining Company 

New York Office : 42 Broadway 

Purchasers of 

GOLD, SILVER, COPPER 
AND LEAD ORES 

Smelting Works— International, Utah 
Refineries : 
Rarltan Copper Works, Perth Am boy, N. J. 
International Lead Refining Company, East Chicago, Indiana 

Ore Purchasing Department: 
621 Kearns Building, Salt Lake City, Utah 

Branches : 
612 PaulBen Building, Spokane, Washington 



ATKINS, KROLL & CO. SAN FRANCISCO 

Impart Merchant*. 
DANISH FLINT PEBBLES. SILEX LINING. CYANIDE. 
KriCKSII.VER. MINING CANDLES. FIREBRICK. 
BORTS tND CARBONS. BLACKSMITH COAL. COKE. 
COTTON WASTE. SCHEELITE CONCENTRATES, 7»%. 

SUPERIOR QUALITY ZINC DUST. 
Stocks Carried. 

Buyers of Quicksilver and Platinum, also Ores of Antimony. 
Bismuth. Molybdenum, Tungsten, Vanadium. Zinc, etc. 



BEER, SONDHEIMER & CO, 

FRANKFORT-ON-MAIN, GERMANY. 

Buyers of Zinc Ores Carbonates, Sulphides and Mi«d 

- Ores, Copper Ores, Copper Matte, 

Copper Bullion, Lead Bullion, Lead Ores, Antimony Ores, Iron 
and Manganese Ores. 

Sellers °' Spelter, Antimony, Antimonial Lead, Arsenic, 
Zinc Dust. 

Own Smelting and Refining Works. New York Office, 42 Broadway 



E. F. HUTTON & CO. 

===== BONDS ===== 
Members New York Stock Exchange 
490 California St. San Francisco 



J. C. WILSON & CO. 

Members New York Stock Exchange New York Cotton Exchange 
Chicago Board of Trade 
The Stock and Bond Exchange, San Francisco 
Main Office ... Mills BIdg., San Francisco 

Branch Offices: 

Los Angeles, San Elego, Coronado, Cal.; Portland, Ore.; Seattle, Wash. 
Private Wire, Chicago, New York 



July 5. 1913 



MINING AND SCIENTIFIC PRESS 



United States Smelting, 

Refining and Mining Co. 

55 Congress St., Boston, Mass. 

1SKKIII K- «1MM, V Ml sMIM I I Mi CIIMIMM 

Custom Lead and Copper 8melters and Cuatom 
Lead and Zinc Concentrator at Needlea, Cat Ad- 
drrss Needlea. Oil., and 908 W. P. Storey Building. 
Loa Anff«le., Cal. 

■ AMMii 1 II rot'l'HIt (IIMM. IIIWIMM 

Cuatom Copper Smelter at Kennett. Cal. Address. 
Kennett. CaL 

UNITED STATES SMELTING COHPAM 

Custom Lead and Copper Smelters at Mldvale. Utah. 
Address. Salt Lake City. Utah. 

I. HI II 1111*1) MINKS IOMPAW 

Custom Cyanide Mill at Gold Road, Arizona. 

l.MTKII STATES METAL IIKFIMMi COMPANY 

Custom Copper Smelter and Electrolytic Copper 
Refinery at Chrome. N. J. Electrolytic Lead Re- 
finery at Grasselll, Ind. Address. 42 Broadway. 
New York City. N T. 

CIA. DE REAL DEL MONTE 

Mines and Mills at Pachuca and Real del Monte. 
Address. Pachuca. Hldalg"), Mexico. 

UNITED STATES n. A M. EXPLORATION COMPANY 

Address. 42 Broadway. New York: 411 Mutual 
Building. Mexico. D. F. : 1303 Hoge Building. Seattle. 
Wash.: W. P. Storey Building. Los Angeles. Cal.: 
Newhouse Building. Salt Lake City. Utah. 

INTERNATIONAL METALS SELLING COMPANY 
42 Broadway. New York City, N. Y. 

Buyers of 

ORES, MATTE AND FURNACE PRODUCTS 

Refiners of 

BLISTER COPPER AND LEAD BULLION 




CARS 

for Mines, Smelters, etc. 
Electric Mining Locomotives, 
Electric Cars 
Switches, Frogs, and Equipment. 

THE ATLAS CAR 6 MFG. CO. 

DEPT. K, CLEVELAND, OHIO 



BACON v FARREL 
ORE & ROCK 
CRUSHING v WORLD KNOWN 

ROLLS-CRUSHERS 

EARLE C.BACON. ENGINEER 
HAVEMEYER BUILDING, NEW YORK 



BLAISDELL VAT EXCAVATORS 



Vacuum Slime Filters 



El Oro Tube Mill Lining 



BLAISDELL COMPANY, 



Pacific Electric Bdg., 
Los Angeles, Cal. 

1136 Real Estate Trust Bdg.. Philadelphia, Pa. 



THE DENVER QUARTZ MILL & CRUSHER GO. 

Manufacturers of Rock Crasher... Ore Feeders and all kinds 
of Ore Milling Machinery. Especially the Denver Quartz Mill. 
The best type of Chilian Mill on the market. Aik for Catalog No. 10. 
21* and 217 COLORADO BDG., DENVER, COLO. 



Lima Locomotives 



KIr.t-class material, careful Inspection and rigid tests uphold 
the standard of our locomotives. Work man.hlp counts when 
permanency Is desired and we know our workmen. 

SEND FOR CATALOG 

LIMA LOCOMOTIVE CORPORATION 

111 W.Second St. LIMA, O. 

SO Church Htreet, Now York 



"Trifles Make Success and 
Success is no Trifle" 




The big things about a car must 
be right but it is getting the multi- 
tude of little things right that 
makes a car successful. We watch 
these little things although there 
is more immediate profit in slight- 
ing them for we have been in 
business fifty years and want to 
be at least fifty more. 



The Watt Mining Car Wheel Co. 



Denver: Llndrooth, Shubart&Co. 
San Francisco: N. D. Phelps 



Barnesville, Ohio 



We Manufacture 

Merrell Pipe Threading Machines— 
Nothing Else ! 

We do not build pipe threading ma- 
chinery as a soit of side-line. 

We've made MERRELL PIPE THREADING 

MACHINERY for more than 20 years. 

We build them so well we know they 
will do better work— easier work— and 
quicker work threading pipe than any 
machine ever built for the purpose— 
and wo put our guarantee back of them. 
Should you not find our claims true 
your money is refunded at once! 

Will you try the 
Merrell for SO days t 

THE MERRELL MFG. CO. 

The Combined Hand Foweri Port- 
able or Stationary Merrell. Ca- 10 Curtis St, Toledo, Ohio 

pacity up to 10" - steel or wrought Machines carried In stock In San 

pipe cut with same dies. Francisco, Portland, Seattle, Denver 




PAPER 



BLAKE, MOFFIT & TOWNE 

37 to 45 First St., San Francisco 
Los Angeles Portland 




California Perforating 

Screen Company 

Manufacturers of perforated Sheet 
Metals of all kinds for Mining and 
Milling Machinery and other uses. 
416 Harrison Street, San Francisco, Cal. 



RECENT CYANIDE PRACTICE 

Edited by T. A. RICKARD. 

A compilation of the best and most trustworthy articles on 
the subject by authors that are leaders In this particular 
branch of metallurgy. 

350 Pages published bt $2 Postpaid 

MINING AND SCIENTIFIC PRESS, SAN FRANCISCO, CAL. 



elephant brano j XHE PHOSPHOR BRONZE SMELTING CO. 



REG. U. 3. PAT. O c F. 



2200 WASHINGTON AVENUE. PHILADELPHIA. PA. 



ELEPHANT BRAND 



"f 



INGOTS. CASTINGS. WIRE. SHEETS. RODS. Etc. 

— DELTA METAL — 

IN PARS FOR FORGING AND FINISHED RODS 

ORIGINAL .KO^SOLC MiltR. •■. TM| U. S. 



80 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 



COMPLEX ZINC ORES 

Successfully treated, without roasting, by the 

HUFF ELECTROSTATIC 
SEPARATOR 

SAVE your gold, silver, lead, copper and iron 
values in your zinc middlings and make your zinc 
saleable at ANY smelter. 

For full information, write to 

THE AMERICAN ZINC ORE SEPARATING COMPANY 

1218 Foster Building Deover, Colorado 



Interested in Mining? 

Try the country served by the 
Sonora Railway and 

Southern Pacific Railroad of Mexico 

SONORA— SINALOA—TEPIC— JALISCO 

It has other RESOURCES and rich OPPORTUNITIES 

also in 

Cattle — Farming — Timber 

Let us tell you something of them. 
H. LAWTON. G. P. A.. 

"West Coast Route" Guaymas, Sonora, Mexico 



HARBISON-WALKER REFRACTORIES CO. 

MANUFACTUBEKS OF 

High Grade Silica, Chrome, 
Magnesia and Fire Clay Brick 

IMPORTERS OF 

Chrome Ore and Spaeter Dead Burned Magnesite 

PITTSBURGH, PA. 




Mining Filter 
Presses 

WM. R. PERRIN & GO. 

CHICAGO, V. 8. A. 
TORONTO, CANADA 



TISCO 



MANGANESE 
STEEL CASTINGS 



FOR SEVERE SERVICE 
TAYLOR- WHARTON IRON & STEEL CO. 

High Bridge, New Jersey 



Material and Service Unexcelled. 

Scullin-Gallagher Iron & Steel Co. 

Main Office and Works. St. Louis. Mo. 
Manufacturers of High Grade Steel Castings 
Matte Ladles and Pans — Slag" Bowls — Bullion Molds — Liners — Roll 

Shells— Dies — Cams — Tappets — Bosses. • 
Also miscellaneous castings ol every description. Send us your Inquiries. 
B. H. PECK. Western Sales Agent White Bldg., SEATTLE, WASB. 
Definite delivery given at lime order or Inquiry is placed. 



The Butters Patent Vacuum 
Filter Co., Inc. 



Butters 



Head Office: 

SO Church Street 
NEW YORK, U.S.A. 



Filters 



AGENTS: 

S*ndy croft Foundry Co., Ltd. 

and Cheater, England. 
Fruer & Chaimer*. Ltd.. London and 

Branch Office. 
Fried. Krapp, A. G., Gnuonwerk, 

Madge burg. Germany. 

BRANCH OFFICES: 

908 Metropolis Bank Bldg., San Francisco, Cal. 
Gante No. 1, A par tad o 1678, Mexico City. Mexico. 
64 New Broad St., London, E. C. 



FLORY HOISTS 

STEAM AND ELECTRIC 




Are adapted for all 
kinds of work. Made 
In all sizes. For Mines, 
Contractors, Quarries, 
Dredging, Cable.ways, 
Slate Machinery. 



S. FLORY MANUFACTURING CO. 

BANGOR, PA. 

SALES AGENT 
A. L. YOUNG MACHINERY CO., San Francisco, CaL 




Frenler's Spiral Pump 

THE MOST DURABLE FOR 
SLIMES, TAILINGS, BATTERY SANDS, ETC 

Agents 

AHIs-Chalmers Co., Stearns-Koger Mfg. 
Chicago. III. Co.. Denver, Colo, 

llarron, Rickard <fe McCone, 
San Francisco, Cal. 

FKENIER « SON. Rutland, VI. 



RIBLET TRAMWAYS 

Automatic, High Speed, Lock Coil Track Cables, Railroad 
Type Trucks, Pony Trams for Light Tonnage. 

RIBLET TRAMWAY CO. 

SPOKANE, WASH. NELSON, B. C. 



Steel Castings 

Of every kind and description. Made to the United States 
Government and all recognized specifications. Cementation 
Steel Castings for crank shafts, connecting rods, gear blanks, 
cylinders, etc., and all parts where a maximum ability to re- 
sist wear Is required and also where a high elastic limit la 
desired. 

We solicit your valued orders and guarantee deliveries 

CHESTER STEEL CASTINGS CO. CHESTER, PA. 

H. L. VAN WINKLE, Sole A«eni P.cific Com. 160 Bole Si.. Su Fr.ncUoo 



DIAMOND DRILLS 

Ours Is the most complete line made. 360 to 6000 ft. 
Hydraulic Feed, Screw Feed. Hand Power, Horse Power, 
Gasoline, Steam, Air and Electricity. Send for Catalogue. 

STANDARD DIAMOND DRILL COMPANY 

745 First National Bank Bdg., CHICAGO. ILL. 



July 5, 1913 MINING AND SC1I.NTIFK 1'KCS.S 31 



WIRE ROPE EFFICIENCY 

Car*fut •tudjr oi wlr* rope working conditions, and long 
"P" ! '»>« "» combining material and construction, hav* re- 
suited Id our balng praparad to furnish wlr* ropa for any ser- 
vice that will gtva mail mum raaults. 

For heavy duty of all hinds, w* recommend our rad strand 

HERCULES WIRE ROPE 

(Trad*- Mark Hagtstarsd) 

This grad* of rope has great strength, together with unusual 
toughnaaa and flexibility. It la strong, safe and durable. 

All of our rope* are made from hlghsat quality material of 
the grade beat adapted to a particular work. 

WR1TK FOR CATALOO 

A. LESCHEN <5 SONS ROPE. C2 



ST. LOUIS, MO. 
Chicago DanTir 
Sftfi Frioelico 



Sail Laht 



No 
Use. 




There is no use in mining ore and then letting part of 
the gold escape to the tailing pile. Install a Pierce 
Amalgamator and save all the free gold including the 
flour and rusty particles that can be caught in no other 
way. 

Send lor Catalog No. 10. 

L. S. PIERCE, 1738 Broadway, Denver, Colo., U. S. A. 



KEYSTONE 
CABLE Dl^IIXS 

for P acer Gold Testing, in advance of dredge; 
Mineral Prospecting for Lead, Zinc, Coal, 
Copper, etc.; Oil, Gas, and Water Well Drill- 
ing; Blast Holes in Cement 
and Stone Quarries. Equipped 
with steam engine, gas or elec- 
tric motors. In writing specify 
class of work yoj are inter- 

KEYSTONE PLWER DRILL CO. 

BfcAVER FALLS, PA. 
AGENT j: Huron. Rickaid & McCone 

San Fr&ndico, Cal. 
Caldwcli Mach. Co., S«allle. Waih. 





Give Your Motors 
a Chance 

(live them accurate, 
durable IraiiHinlH- 
slon. We will ilupli- 
catc any gear— do It 
correctly — quickly — 
reasonably. 

Gear is oar middle name 




Pacific Gear & Tool Works, J' 3 * Klr^.co 



Conveying. Elevating arid Hoisting Machinery. Robins Coal and Coke Crushers. 
We carry a complete stock of Chain) and Sprockets. Write for monthly bulletin*. 
ROBINS CONVEYING BELT COMPANY 

Main Office : 1 3 Park Row, New York San Franciico : The Griffin Company 
Chicago: Old Colony Building Spokane: United Iron Works 



RISDON JOHNSTON CONCENTRATOR 




The Standard Vanner Concentrator. Always In stock. 
Send for Catalog No. 14. 

UNION IRON WORKS CO. 



Sole Manufacturers. 



San Francisco. California 



i 




i 



FOR DEPENDABLE SERVICE INSTALL 

DEANE of HOLYOKE 
MINE PUMPS 

Heavy Construction. Large Bearings. 

AH Parts Accessible. Liberal Valve Areas. 



THE DEANE STEAM PUMP GO. 



K'ORKS: HOLYOKE. MASS. 



New York Offic* r'MS I 



Write for Bulletin D 21S-S2. 



Branch Offices in all Principal Cities 



82 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 



MINING MACHINERY FOR SALE 

Located near Los Angeles, on Santa Fe R. R. 



1 — 6x16 Allis-Chalmers dry grinding 
Tube Mill, silex lining,' pinion, 
pinion shaft, friction clutch, bear- 
ings, and circulating water pump. 

1 — 3V4x20 Allis-Chalmers, dry-grind- 
ing Tube Mill, silex lining, pin- 
ion, pinion shaft, and circulating 
water pump. 

] — 3x10 revolving Screen, geared, 
covered, 10-mesh wire cloth. 

1 — 7x8 Dodge Crusher, tight and 
loose pulley, 1 set new jaws. 

1 — 2-tube 15" dia. Sand Drier, about 
26' long, complete with spiral 
feed, bearings, sole plates, sprock- 
ets, and chain. 

1 — 6 H.P. vertical Boiler, complete 
with all fittings, gauges, valves, 
oil burner, and injector. 

1— 25 H.P. Commercial Distillate 
Engine, complete with distillate 
and water tanks, circulating pump, 
piping, batteries, etc. 

2 — 2" Centrifugal Pumps. 
1 — 1" Triplex Pump. 

1 — 1" Steam plunger Pump. 

1 — 2000 lb. Friction belt driven sin- 
gle drum Hoist 

1 — 8x8 Air Compressor — belt driven. 

1 — 100 H.P. Westinghouse Motor and 
auto starter, 440 volt, 3 phase, 60 
cycle, 580 R.P.M. 



1—40 H.P. Allis-Chalmers Motor and 
auto starter, 440 volt, 3 phase, 60 
cycle. 1130 R.P.M. 

1 — 20 H.P. General Electric Motor 
and auto starter, 440 volt, 3 
phase, 60 cycle, 1200 R.P.M. 

Switches, wire, carbon lamps, sock- 
ets, insulators, etc. 

1 — 18"xl2 American Tool Works 
Lathe, chuck, face plates, pipe 
center, tools, dogs, boring bars, 
etc. 

1—20" Sibley W. & L. Feed Drill 
Press, cbuck, taper shank drills, 
etc. 

1 — 8" Partridge Emery Wheel Head, 
2 emery wheels, counter shaft. 

Solid and adjustable wrenches, ham- 
mers, pipe wrenches, dies and cut- 
ters, forge anvil and tools, wood 
saws, vises, etc. 

1— Pr. 8" Blocks. 100 ft. 1" Manila 
rope. 

1— Pr. 6" Blocks, 100 ft. %" Manila 
rope. 

1—2 Ton Y. & T. Chain Block. 

1— Elevator belt, Sawyer, 125 ft. 6", 
6 ply, with 125 6x3 Finch buck- 
ets, complete with top and bottom 
pulleys, shafting, ring oiling bear- 
ings, and take-up boxes. 



1— Elevator belt, Sawyer, 125 ft. 8", 
6 ply, with 125 7x4 Finch buck- 
ets, complete with top and bottom 
pulleys, shafting, bearings, and 
take-up boxes. 

Rubber, leather, and canvas belting, 
bearings, plain and ring oiling, 
split wood pulleys, shafting. 

1 — American Blower Co. No. 55 
Blower. 

1 — Buffalo Forge Co. No. 4 Blower. 
10,000 New bags, 18x31, Branded. 
8,000 Old bags, 19x34, Branded. 
1 — Becker 100-g. Pulp Balance. 
1— Set weights, 1 eg. to 100 g. 
1 — Fairbanks Moisture Scales. 
1 — Nest 8" Testing Screens. 
1 — Brass 8" 200 mesh Testing Screen. 

3 — Side Dump Cars. 18" gauge. 

1 — End Dump Car, 18" gauge. 

2— Switches. 

1500 ft. 12 lb. Ralls. 
400—3x6x36 O.P. Ties. 
1 — Jim Crow Rail Bender. 
Spikes, fish plates, bolts, etc. 

4 — Wheelbarrows, iron. 
4 — Hand trucks. 

1 — Roller bearing Truck, 3x5. 
Shovels, picks, bars, etc. 



For prices and further information, address 

213 Higgins Bidg. E. V. LAWXEN 



Los Angeles, Cal. 



CHALMERS & WILLIAMS 

INC. 

Mining, Crushing, and Cement 
Machinery 

CHICAGO HEIGHTS, ILL. 



Second Hand Machinery 

BARGAINS IN REBUILT MINING AND MILLING 
MACHINERY OF ALL KINDS 

Detailed List of stock on hand sent on request. If you want 
certain Machinery at bottom prices, write 

n T M/~M A STFU himiw folsom street 
u. j . ivitivirvia i E/iv, S an francisco cal. 



TRAMWAYS 

For all transportation purposes. 
Twenty-five years' practical experience. 

PAINTER TRAMWAY CO., S. F. 



Wanted — Bauxite or Bauxite Clays 

Must be within reasonable distance 
of San Francisco. 

General Chemical Company of California 

Royal Insurance Bidg.. San Francisco 



Great Western Smelting & Refining Company 

Spear and Folsom St-, San Francisco. 

Babbitt Metal for all kinds of service requirements. 
We buy all classes of scrap metal. 



f<»r sale: 

Will sacrifice two nearly new Sullivan "H" Drills, with 
equipment and pumps complete for boles 500 feet deep, with 
combination hoisting pi uu and water swivel, - 1 L - Inch nnd 
**B" cnnlng; casing rods, hose and wrenches complete, ready 
for drilling without further supplies! all In good order. 
A. McCOLMAN, 88 and 90 Front St.. Portland, Oregon. 



ffitnarntt Srtllmg flto. 

PLACER PROSPECTING AND EXAMINATION WORK 



WATER WELLS DRILLED 



BALBOA BLDG. 



SAN FRANCISCO, OAL. 



WANTED — SECOND-HAND AMALGAMATING PLATES 
AND QUICKSILVER. We buy precipitates, amalgam, fine 
and base bullion, scrap platinum, high grade gold and silver 
ores and material containing the precious metals In any 
amount form, or condition. Send details or sample and we 
will quote prices. 

THE METALS BUYING AND REFINING CO., 
210 San Frnnrlaco St., EI Paao, Texas. 

References: City National Bank, Mine & Smelter Supply 
Co., El Paso. 




SILVER PLATED COPPER 
AMALGAM PLATES 

FOR SAVING GOLD 

Most extensive and successful 
manufacturers. Old plates re- 
plated — made equal to new. 



San Francisco Plating Works 

1349-51 Mission St.. San Itaadscs. 
E. C. DENN1ST0N, Prop. 

Get our prices. Catalog sent. 

Telephone Market 2yi6. 



Jtilv 



IMS 



MINING AND SCIENTIFIC PRF.SS 



33 





DEWEJ^STRONC&CQ 

PATENTS 

Ml Crarkrr •alMlaa. sji» Fraarltc* 

Established ltflO 

P^TKNT* nilT\|\KI> IN Ki t- « Ol MltlK* 

\% r >-ni mull »tit i rhanr, on rrqural, oar llnntllionk no 

Pat ml a, I r • < I ■ nm (>., i Copy right a, ronlalalna; o\ rr ton 

rata of mrrhanleal inotrnienta. 

Amontj thr patent* rt ct nthj nhtahutl through tin, th* /*<>/- 
lowinQ arr worthy of special mention : 



IN'IN'i 



si.nr 



'E. — Pierre Bou«ry. The object of this In- 
vention la to provide a means for detachable mounting bars 
of the gristly in the sluice-box so that they may be removed 
and Int* rt-iiiinured when worn or broken, and to provide 
means by which the bars may be Interlocked and secured In 
place, to prevent their being maliciously removed. 



GAS EVOLVE STARTER.— Harnet N. Botta. It la the 
object of this Invention to provldo a device for starting gas 
engines. and the like, which 1a designed to act on the engine 
shaft, and which la provided to obviate the usual cranking 
operations now generally In use and remove tho difficulties 
and Inconveniences Incident thoreto. 



UTENSIL COVER OR RACK.— Sarter & Behm. It Is the 
object of this Invention to provide a rack which Is especially 
constructed and designed for the purpose of holding the 
thin sheet metal covers or lids employed: on cooking utensils, 
such as kettles and the like. 



CONCENTRATORS. — William W. Whltton. The object of 
the Invention la to provide a concentrator of few parts and 
simple construction, which Is adapted to operate continuously 
during the feeding of pulp to discharge the separated grades 
of the ore and tailing*?, and which separation will occur 
automatically during the running of the machine. 



RESILIENT TIRE. — Marshall C. Rogers. The object of 
this Invention la to provide a wheel structure, the design of 
which permits a resilient motion of the tread portion of the 
wheel relative to a central or hub portion. 



SPACE BAND CHUTE.— Umberto Plagnerl. This Invention 
relates to linotype machines and more particularly to space- 
band chutes thereof. 

(Copies of any of the above furnlahed for 10 cents each.) 



TEX-STAMP MILL FOR SALE. 
\t-nrly new ten-atnmp water-power gold mill, together 
with nil neeeMMiiry wnter-wheela, belting, etc., for sale. 
MtimpN, UMIO poumla each. Blake ore-cruaher. Four Frue 
MintHTi. Two Challenge feedera. Complete plant. Ternia, 
eaah. Apply to JOHN P. DA VIS, 1404 Humboldt Savings 
Hunk IliiilillnK, Snn Frnnclaco. 



GOLD DREDGE FOR SALE 

5 cable foot continuous bucket electric dredge, manganese 
hueketa, 00,000 cubic yarda capacity. Fully equipped. Ten 
ntllea from If, P. Ry., near Helena, Mont. For full particulars, 
addrraa MAGPIE DEVELOPMENT CO., 609 Lowmau Bdg., 
Seattle, Wnah. 



FOR SALE 



IS qunrtx claim,, or would prefer to Interest capital to help 
develop, and will give a bedrock price chance and a square 
deal. For toll particulars, address Box 170, Mining; and 
Scientific Press. 



MINERAL SPECIMENS 

I make a specialty of supplying MINERAL SPECIMENS 
A\D COLLECTIONS for students, prospectors, and private 
cabinets. I buy specimens In all quantities. 

R. M. WILKE, Box 312, Palo Alto, Cal. 



DIVIDEND NOTICE. 

THE GERMAN SAVINGS & LOAN SOCIETY, 
(The German Bank), 
526 California St. 
Mission Branch, corner Mission and 21st St. 
Richmond District Branch, corner Clement St. and 7th Ave. 
Haight Street Branch, corner Haight and Belvidere Sts. 
For the half year ending June 30, 1913, a dividend has 
been declared at the rate of four (4) per cent per annum on 
all deposits, free of taxes, payable on and after Tuesday, 
July 1, 1913. Dividends not called for are added to the de- 
posit account and earn dividends from July 1. 1913. 

GEORGE TOURNY, Manager. 



220 PAGES- 



-$4 Prepaid. 



Dredging for Gold in California 

By D'ARCY WEATHERBE 
for sale by MINING AND SCIENTIFIC PRESS 



POSITIONS WANTED 



rh« oo*l <>f advertising for positions wanted it f re nts ytr word 
per insertion. Minimum order 10 cents. Replies forwarded without 
"i r n charge. Remittance mutt accompany or«4*r. 



ELECTRIC! A .* 



MOTION 
illl. am el 
• ralde Avt 



r. and power plan 

Long Reach. Cul. 



» Coma took Lode; 
: Inatalllng, tnaln- 
iii Francisco. 

•man, experienced 
• UN REN DEL, 6$ 



SUPERINTENDENT, practical and experienced, wants posi- 
tion; competent miner, surveyor, assayer, and cyanide man. 
Box 188, Mining and Scientific Press. 

MINE MANAOKR AND SUPERINTENDENT wants job; JO 
years Western United States and Mexican experience; many 
years with two of world's largest companies. Box 169, Mining 
and Scientific Press. 



MANAGER AND SUPERINTENDENT, with 20 years practical 
experience In charge of mines and mills, opening out, develop- 
ing, equipping, and putting on a paying basis gold, silver, lead, 
and copper mines; knows Spanish. Box 182, Mining and Scien- 
tific Press. 

MINE SUPERINTENDENT, now operating 20-stamp property, 
desires change; 30 years old, temperate, and a hustler; expert 
at handling bad, heavy ground; extensive experience In all 
Western states the Mother Lode, and Spanish America. Box 
180, Mining and Scientific Press. 

ASSAYER desires employment with mining, cyanldlng or 
smelting company; salary moderate. Box 177. Mining and 
Scientific Press. 

GRADUATE MINING AND CIVIL ENGINEER desires position 
as superintendent of a mine; has had 14 years mining experi- 
ence and can give the best of references as to character and 
experience; open to engagement at once. Box 164, Mining and 
Scientific Press. 

MINE AND MILL SUPERINTENDENT, with over 20 years 
practical experience, wants position; first-class assayer, ma- 
chinist, and millwright; has operated mills ranging In size from 
5 to 80 stumps; thorough in mill planning and building; ref- 
erences. Box 154, Mining and Scientific Press. 

OPEN AT ONCE — Broad-gauge general manager, technical, 
coupled with good horse sense and 23 years experience; salary 
$12,000 and control of directorate; will tender resignation. If at 
the expiration of 12 months property has not been annexed. 
Box 166, Mining and Scientific Press. 

ASSAYER, CYANIDE CHEMIST AND SURVEYOR, long ex- 
perience, best references; Arizona, California, Nevada or Oregon 
only. Box 167, Mining and Scientific Press. 

POSITION WANTED — Cyanide mlllman. experienced assayer 
and surveyor, cyanide testing; sober; salary reasonable; any lo- 
cation; at present employed. Box 145, Mining and Scientific 
Press. 



POSITIONS VACANT 



TTie cost of advertising positions vacant is t cents per word per 
insertion. Minimum order 50 cents. Replies forwarded without 
extra charge. Remittance must accompany order. 



WANTED — Competent assayer. 
Chewelah, Wash. 



Address S. M. McCLINTOCK, 



THE MINING MAGAZINE 

Published Monthly at 
819 Salisbury House. London, England. 
T. A. RICK Alt D. Editor EDGAR RICKARD, Business Mgr. 
Subscription Rates i 

United Kingdom , 12 shillings per annum 

Canada 83 per annum 

All other countries in the PoBtal Union 16 shillings or 84 per annum 

Subscriptions received by MINING AND SCIENTIFIC PRESS. 



CATLIN & POWELL CO. 

15 Broad St., NEW YORK 
7 Great Winchester St., LONDON, ENG. 



STOCK BROKERS 

Specialists in the Mining Markets for more 
than 10 years. 



PUBLISHERS OF 

INVESTMENT NEWS BUREAU 

COPY FREE ON REQUEST 



84 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 



Ik OliverTilter 




Installations Since January 1913 



Alvarado Mining 4 Milling Co. . 


. Mexico, 


150 Tons 




Mexico, 


200 " 


Buckhorn Mines Company . . . 


Nevada, 


350 " 


Black Eagle Gold Mining Co. . . 


. Nevada, 


75 " 


Clnco Mlnas Co 


Mexico, 


300 " 


Commonwealth Mining 4 Milling Co. 


Arizona, 


450 " 


El Favor Mining Co 


Mexico, 


150 " 


Free Coinage Mining Co. ... 


Colorado, 


50 " 


Globe Con. Mining Co. 


California, 


100 " 


La Lucha Mining Co. . , 


Mexico, 


75 " 


Mexican Candelarla Co 


Mexico, 


50 " 


Mezquital Mining Co 


Mexico, 


100 " 


Presidio Mining Co 


Texas, 


100 " 


Santa Rosa Mining Co. . . . 


Mexico, 


150 " 



AND MANY OTHERS 

JOIN THIS LIST 

Ten Oliver Filters are now 
being installed for one of any- 
other make or type. 

All purchasers of Oliver Fil- 
ters are granted license to 
operate under Moore Process 
Patents. 

Send for catalog. 

OLIVER CONTINUOUS 
FILTER COMPANY 

San Francisco, Cal. 

AGENTS FOR 

THE MOORE FILTER COMPANY 

NEW YORK 



BUYERS' DIRECTORY 

(— ) Indicates Every Other Week or Monthly Advertisement. 
INDEX TO ADVERTISERS, PAGE 41 



Page. 

Agitators 

Traylor Eng. A Mfg. Co * 52 

Amalgamator* 

L. S. Pierce 31 

Amalgamated Platen 

San Francisco Plating Works 33 

Asnnyers* and Chemists* 
Directory 

See page ft 

Assayers' and Chemists* Sup- 
lie* 

Braun Corporation. The 27 

Braun-Knecht-Heimann Co 27 

Denver Fire Clay Co 40 

Balances and Weights 

Alnsworth A Sons Wm 88 

Braun Corporation". The 27 

Braun-Knecht-Hefmann Co 27 

Denver Fire Clay Co 40 

Kohlbusch, Herman. Sr 38 

Mine & Smelter Supply Co — 

Salt Lake Hardware Co 38 

Thompson Balance Co 89 

Troemner. Henry 38 

Ball Mills 

Allis-Chalmers Mfg Co 12 

Hardinge Conical Mill Co 18 

Traylor Eng. A Mfg. Co 62 

Ball Mill Pinto* 

Chrome Steel Works 16 

Bearings 

Dodge Mfg. Co U 

Hyatt Roller Bearing Co 39 

Meese A Gottfried Co Back Cover 

Belting 

Diamond Rubber Co., The — 

Dodge Mfg. Co 14 

Fairbanks. Morse & Co — 

Gandy Belting Co — 

Goodrich Co., B.F 4 

Meese A (i.)tlfri."l Cr> Buck Cover 

Robins Conveying Belt Co 31 

Webster Mfg. Co — 

Belts, Conveyor 

Diamond Rubber Co.. The — 

Dodge Mfg. Co II 

Fairbanks, Morse & Co — 

Gandy Belting Co — 

Goodrich Co. B. F 1 

Meese A Gottfried Co Back Cover 

Robins Conveying Belt Co 31 

Webster Mfg. Co — 

Blasting Powder 

Du Pont de Nemours Powder Co — 45 

Trojan Powder Co — 

Blowers 

Allis-Chalmers Mfg Co 12 

Connersville Blower Co — 

General Electric Co. .. — 

Hendrie A Bolthoff Mfg. A Sup. Co. 2 

Worthington. Henry R — 

Books 

Mining and Scientific Press 

29 83 35 18 

Wiley* Sons. John 48 

Boots and Shoes 

Putmai. Boot A Shoe Co 39 

Boilers 

A bend roth A Root Mfg. Co 50 

Allis-Chalmers Mfg. Co J2 

Demarest Co, , D. D 36 

Fairbanks. Morse A Co — 

Harron. Rickard A MK'otie RackCover 
HendrieA Bolthoff Mfg. A Sup. Co. 2 

Hendy Iron Wks., Joshua 68 

McMaster. D. J 82 

Power A Mining Machinery Co — 

Union Iron Works Co 49 

Vulcan Iron Works 48 

Brick, Fire 

Atkins. Kroll A Co 28 

Braun Corporation. The 27 

Braun-Knecht-Heimann Co 27 

Denver Fire Clay Co 40 

Harbison Walker Refractories Co. . .80 
Brick, Magnesia 
Harbison-Walker Refractories Co. . .30 
Brick, Silica 

Harbison-Walker Refractories Co. . .80 
Bridges 

American-Bridge Co 58 

Bossheads 

Chrome Steel Works 18 

Brlqucttlng Machinery 

Braun Corporation, The 27 

Braun-Knecht-Heimann Co 27 

Traylor Eng. A Mfg Co 52 

Backets 

Allin-unalmers Co 14 

Broderick A Bascom Rope Co 59 



Page. 

Brown Hoisting Machine Co 60 

Dodge Mfg. Co 14 

Harron.Rickard A McCone Back Cover 

Hayward Co., The 53 

Hendrie A Bolthoff Mfg. A Sup. Co. 2 

nendy Iron Wks., Joshua 69 

Leschen A Sons Rope Co., A 81 

Meese A Gottfried Co Back Cover 

Robins Conveying Belt Co 31 

Watt Mining Car Wheel Co 29 

Wellman-Seaver-Morgan Co 67 

Burners, OH 

Braun Corporation. The 27 

Braun-Knecht-Heimann Co 27 

Denver Fire Clay Co 40 

Harron.Rickard A McCone BackCover 

Union Iron Works Co 49 

Cnblenaya, Suspension 

Broderick A Bascom Rope Co 59 

Flory Mfg. Co. S 89 

Leschen A Sons Rope Co., A 31 

Painter Tramway Co 32 

Vulcan Iron Works 43 

Cage* 

Chalmers A Williams 82 

Hendrie A Bolthoff Mfg. A Sup. Co. 2 

Hendy Iron Wks.. foshua 58 

Traylor Eng. A Mfg Co 62 

Union Iron Works Co 19 

Wellman-Seaver-Morgan Co 57 

Carbons, Borta, and Diamonds 

Atkins. Kroll A Co 28 

Cars 

Allis-Chalmers Mfg. Co 12 

Atlas Car A Mfg. Co 29 

Demarest Co.. D.D 69 

Fairbanks. Morse A Co — 

Harron. Rirkard AMcCone Back Cover 
Hendrie A Bolthoff Mfg. A Sup. Co. 2 

Hendy Iron Wks., Joshua 68 

Mine A Smelter Supply Co — 

Pacific Foundry Co 61 

Traylor Eng. A Mfg. Co 52 

Watt Mining Car Wheel Co 29 

Wellman-Seaver-Morgan Co 57 

Castings 

Abendroth A Root Mfg. Co 60 

Allen American Manganese Steel 

Co., Edgar — 

American Bridge Co 68 

Chester Steel Castings Co 80 

Chrome Steel Works 16 

Dodge Mfg. Co 14 

Lunkenheimer Co 46 

Pacific Foundry Co 61 

Scullin-Gnllogher Iron A Steel Co... 30 
Taylor-Wharton Iron A Steel Co.... 30 

Van Winkle, H.L 30 

Yuba Construction Co 61 

Chain 

Dodge Mfg. Co 14 

Fairbanks. Mors-- A Co — 

Harron. Rickard A McCone BackCover 

Meese A Gottfried Co Back Cover 

Robins Convey i ng Belt Co 31 

Taylor- Wharton Iron A Steel Co. . . .30 
Webster Mfg. Co — % 

Chemicals 

Atkins, Kroll A Co 28 

Braun Corporation. The 27 

Braun-Knecht-Heinmnn Co 27 

Denver Fire Clay Co 10 

Dodge Mfg. Co 14 

Roessler A Hasslacher Chemical Co . . 38 

Chemists 

See page SS 
Chilean Mills 

Allis-Chalmers Mfg. Co 12 

Chalmers A Williams 32 

Lane Mill A Machinery Co 89 

Power A Mining Machinery Co — 

Traylor Eng. A Mfg. Co 52 

Classifiers 

Allis-Chalmers Mfg. Co 12 

Chalmers A Williams 82 

Dorr Cyanide Machinery Co 89 

Power A Mining Machinery Co — 

Traylor Eng. A Mfg, Co 52 

Clutches, Friction 

Dodge Mfg. Co 14 

Fairbanks, Morse A Co — 

Harron, Rickard A McCone BackCover 

Meese A Gottfried Co Back Cover 

Wellman-Seaver-Morgan Co 57 

Coal Cutters 

Allis Chalmers Mfg. Co 12 

Ingersoll-Rand Co 5 

McKieman -Terry Drill Co 27 

Power A Mining Machinery Co — 

Sullivan Machinery Co 67 

Conl Handling Mnchlnery 

Bartlett A Snow Co.. CO 45 

Dodge Mfg. Co 14 

Fairbanks. Morse A Co — 

Hayward Co.. The 53 

Compressors, Air 

Allis-Chalmers Mfg. Co 12 

American Well Works 44t 

Chalmers A Williams 32 



Julv 



I'M i 



MINING AND SCIENTIFIC PRKSS 



l'a«* 



llarom. Kirkanl ,\ Mr* tut* IterkCnvrr 
Helflnr A H<>ltlt>>lT Mff A -uf t 

Hvtkli In.n «k. I .hut » 

MMOU Kami Ox..,. A 

ttulllvkti M*rhirM*ry Orx 19 

Pnlon Imn W.>rk» Co. 49 

Vulcan Iron Wortla. tt> 

Worthliujtun. Henry R - 

Concentrator Hrlta 

Diamond KubbarOo. — 

Uoudrich Co,. B. F. 4 

t'ont'rnf rntor* 

Alllt-Chalmm Mf». Co II 

Chalnwr. A Willlanui ■-' 

ivi.t. rr..ii.> i.traiorr.. K 

l*ri»t.-r Ma. hni.. r.» . . j 
HmdrU'A llolthuff Mff. A >u('.('o. . .• 
Ilrn.lt In.n »k. J.-hua 
EgD Mininr Machinery CO S 

hmri Mnnn* Machinery Co.".'.".— 

Timj Inr Knit. A Mo?. Co. 64 

Union Imn Work* Co. SI 

Coarrrtr Mixers 

Palrbank*. Mono A Co. — 

Harron. Kirkanl A McCone BackCover 
!'">».: Mininc Machinery Co. ... .— 

Contlraarra 

Alberivr Pump Co. — 

AlUs-t tiaJnuT* site. Co 12 

Sink*' A Know tit* Stoam l*ump Wks.— 
Ca nir ron s team I "urn p Work*. A.8...S7 

Connentvllle Blower Co. — 

Power Specialty Co 89 

RMBOtl Steam Pump Co.. Fred. M.. .41 

Wnrthlmrton, Henry R — 

Contract, Drilling 

Uiucott Drilling Co 32 

Ooai eyora. Belt 

AHIs Chalmers M far. Co 12 

Blak*- a KnowU* Steam Pump Wks.— 

Dpdgt Mff. Co 14 

Mean A Gottfried Co Back Cover 

Robin* Conveying Belt Co 81 

Vulcan Iron Works 40 

Webster MI*. Co — 

Conveyor*, Screw 

Dodge Mfg. Co 14 

Uveas A Gottfried Co Back Cover 

Webster Mfg. Co — 

Coolers, Air 

Power Specialty Co 39 

Coolera, Ore 

Stearns Roger Mfg. Co 61 

Convertcra 

Allls-Chalmers Mfg. Co 12 

HendrioABolthofTMfg.JiSup.Co... 2 

Pacific Foundry Co 51 

Power A Mining Machinery Co — 

Union Iron Works Co 49 

Trmylor Eng. A Mfg. Co 62 

CornUh Fumpa 

Demarest Co.. D. D 5C 

CmipllugR, Hoae 

■ Hulconroy Co., Inc 44 

Crimea 

Brown Hoisting Machinery Co 59 

Hayward Co ?3 

u y, „•.• . Co 57 

Cruclblca 

Braun Corporation Co.. The 27 

Braun-Km-cht-Heimann Co 27 

Denver Fire Clay Co 40 

Dixon Crucible Co.. Joseph 36 

Crusher* 

Allls-Chalmers Mfg. Co 12 

Bacon. Earle C 29 

Braun Corporation. The 27 

Braun- Knee ht- II >?i ma nn Co 27 

Chalmers A Williams 82 

Denver Fire Clay Co 10 

Denver Quartz Mill and Crusher Co. . 29 

Fairbanks. Morse A Co *. — 

Harron. Rickard A McCone BackCover 
HendrieABolthoffMfg.ASup.Co... 2 

Hendy Iron Wks, Joshua 58 

McMaster, D.J 32 

Power A Mining Machinery Co — 

Traylor Eng. A Mfg. Co 52 

Union Iron Works Co 49 

Vulcan Iron Works 40 

Cupels 

Braun Corporation. The 27 

Braun-Knecht-Heimann Co '11 

Denver Fire Clay Co 40 

Cyanide Plants and Machinery 

AbendrothA Root Mfg. Co 50 

Allis-Chalmers Mfg. Co 12 

Blaisdell Co 29 

Butters Patent Vacuum Filter Co. ..30 

Chalmers A Williams 32 

Demarest Co., D.D 66 

Dorr Cyanide Machinery Co 39 

Hammond Iron Works 36 

HendrieABolthoffMfg.ASup.Co... 2 

Hendy Iron Wks. Joshua 58 

Kelly Filter Press Co 7 

Meese A Gottfried Co Back Cover 

Mine A Smelter Supply Co — 

Moore Filter Co 15 

Oliver Continuous Filter Co 34 

Pacific Tank A Pipe Co 5S 



Page 

ivmn A Co.. W». H 90 

Power A Mining Marhiiwi (V». 

R-.lw.--l V f r». Co, 17 

Traylor En*- A Ml*. Co. tts 

llrrrleks and Uerrlek Killing. 

Hay ward Co., Too M 

Hew aterern 

BlalnWll Co. 29 

Dorr Cyankla Machinery Co. 99 

llUtrlbutera 

BtolntoU Co. 89 

i«. .in.,. Mnterlnls 

Alntworth A Son*. William 38 

Buff A Huff Mfg. Co 38 

lieu Co.. A.. The 99 

I > red area 

Bucyrus Company 55 

Marion Steam Shorel Co. — 

New York Engineering Co. 11 

Su-anift-Roger Mfg. Co M 

Union Construction Co V> 

Union Imn Work* Co to 

Yuba Construction Co 64 

DreiiKluc Machinery 

Abeudroth A Root Mu\ Co AO 

Alton American MangancM -•■ 

Co.. Edgar — 

American Locomotive Co 10 

Bucyrus Company 55 

Ha> ward Co.. The 63 

HendrioA Boltlmff Mfg. A Sup. Co.. . 2 

Marion Steam Shovel Co — 

New York EngiueerlngCo 11 

Robins Conveying !Mt Co :i 

Seattle Machine Works 47 

Steam*- Roger Mfg. Co 51 

TaylorWharton Steel A Iron Co.... 30 

Union Construction Co 55 

Union Iron Works Co 19 

Well man -Sea ver-Morgan Co W 

Yuba Construction Co 64 

Drill Mnkera and Sharpeners 

Ingersoll-Rand Co 5 

DrllllnK, Contract 

Linscott Drilling Co 32 

Drills, Air and Steam 

Chicago Pneumatic Tool Co 48 

Demarest Co.. D. D 56 

Harron. Ric kard a McCone BackCover 
HendrieABolthoffMfg.ASup.Co... 2 

Ingersoll-Rand Co 5 

McKie man-Terry Drill Co 27 

McMaster. D. J 32 

Sullivan Machinery Co 57 

Wood Drill Works 41 

Drills, Core 

Ingersoll-Rand Co 5 

McKieman-Terry Drill Co 27 

Standard Diamond Drill Co 30 

Sullivan Machinery Co 67 

Drills, Electric 

Harron. Rickard A McCone BackCover 

Ingersoll-Rand Co 6 

Drills, Prospecting; 

American Well Works 44 

Harron. Rickard A McCone BackCover 

Ingersoll-Rand Co 5 

Keystone Placer Drill Co 31 

McKiernan-Terry Drill Co 27 

Linscott Drilling Co — 

New York Engineering Co 32 

Star Drilling Machine Co- 4S 

Standard Diamond Drill Co 30 

Sullivan Machinery Co 57 

Dynamite 

DuPontdeXemours Powder Co.. E.I.15 

Troian Powder Co — 

Dynamos 

Allis-Chalmers Mfg. Co 12 

Fairbanks, Morse A Co — 

General Electric Co — 

HendrieABolthoffMfg.ASup.Co... 2 
Westinghouse Electric A Mfg. Co.. . . — 
Engineers and Metallurgists 
See pages 6, 8, 10, IS, 1&, 16, IS, SO 
Engines, Gas and Gasoline 

Allis-Chalmers Mfg. Co 12 

Fairbanks, Morse A Co — 

HendrieABolthoffMfg.ASup.Co... 2 

Hendy Iron Wks.. Joshua 58 

Power A Mining Machinery Co — 

Engines , Oil 

Fairbanks. Morse A Co — 

Snow Steam Pump Works 47 

Engines, Steam 

Allis-Ch aimers Mfg. Co 12 

Blake A Knowlcs Steam Pump Wks.— 

Fairbanks. Morse A Co — 

Harron. Rickard A McCone BackCover 

Hendy Iron Wks .Joshua 58 

McMaster. D.J 32 

Traylor Eng. A Mfg. Co 62 

Union Iron Works Co 49 

Vulcan Iron Works 40 

Wellman-Sc a ver-Morgan Co 57 

Excavating Machinery 

Blaisdell Co 29 

Brown Hoisting Machinery Co 69 

Hayward Co.. The 53 

Fans, Ventilating 

Allis-Chalmers Mfg. Co 12 

Fairbanks. Morse A Co — 

General Electric Co — 

Harron. Rickard A McCone BackCover 



Hydraulic Agitation 



1 



MTCRSON AGITATION TANKS '« »»« mt 

HA MM ilHO I 



"The Greatest Advance in Modern 
Cyanide Practice is the 

Paterson Hydraulic Agitation Tank." 

Increased Efficiency, No Foaming, 
Less Cyanide, Economy of 
Power Used. 

For Catalogue and Full Information, Address 

Hammond Iron Works 

WARREN, PA.. U.S.A. 

Sole Owners for the Paterson Tank In the United States, 
Canada and Mexico. 



MEXICO MINE A SMELTER SUPPLY COMPANY 
Sole Agents for the Paterson Tank In Mexico. 



MINING LAW 

For tbe Prospector, 
Miner and Engineer 



By H. W. McFarrbn 




35C pages. 31 chapters. 
Flexible covers. 
Finely printed. 
$2 Postpaid. 

A simple analysis and digest 
of American mining law for use 
by prospectors, minln g engi- 
neers and mineral surveyors. 
By a Mineral inspector of the 
Federal land department, who 
haB had wide practical experience, and Is dally engaged in apply- 
ing the mining law In office and field. It will give the reader a 
comprehensive grasp of the entire subject, an antwer to the 
more general questions that arise, practical hints of great value; 
and much Information not In any other work . 

CONTENTS — Origin of American Mining Law. Public Land 
and Its Survey. Where Locations vay be Made. Who May 
Make Locations. Lode Location: Discovery— Discovery Work- 
Location Notice — Laying Out and Staking — C hanging Boun- 
daries. Amended Location, and Relccatlon — Annual Labor- 
Resumption of Work, Forfeiture and Abandonment Mlllsite 
Location. Placer Location. Lodes within Placers. Tunnel Site 
Location. Patent. Lode Patent : Survey — Application and 
Entry. Patent: Placer, Known Lodes Within t lacers and Mlll- 
sltes. Adverse Claim. Protest, latent Work. Apex or Extra- 
lateral Right Coal Land. Timber and Stone Act. Use of Timber 
on Public Land Timber and Mines Within National Forests. 
Water Appropriation. Digest of state Statutes Relative to Min- 
eral Locations United States Statutes and Regu'ations of the 
General Land Office, MANUAL OF INSTRUCTIONS For The 
SURVEY Of The MINERAL LANDS Of THE U. S. 

Published and For Sale By 

MINING AND SCIENTIFIC PRESS 
420 Market St. San Francisco 



Continued on Next Page. 



36 



MINING AND SCIENTIFIC PRESS 



July 5. 1913 






Double Crimped 
Wire Cloth 



Made from wire of unusual 
toughness which is true to 
gauge gives it longer life than 
punched screens and more than 
twice the amount of screening 
surface. 



The Ludlow-Saylor Wire Co. 



■ »■ < 
»« » 

• ■> . 

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.... 

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:::: 

:s:: 
.... 
■■■■ 

• a >■ » 
«•■■• 

■ ■HI 

■ ■« ■ a 

• * ■ ■ i 

• ■ • ■ • 

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.... 
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«••«■ 
. • >. • 

::::: 
. ■• . . 



St. Iouls, Mo. 



mm 




Are Hade For Operation 
By Any Power. 
Horizontal or Vertical 

Type*. 
Stationary or Portable. 



Write for Catalogue "H" 



The Denting Company, Salem, Ohio 



Hemoo & Hubbdl. ChiCMo Hendrie & BolihoJ Mf 8 . & Supply Co.. Dearer 

Norman B. Millei Co.. S»o hinoito EaalUh Tool St Supply Co.. Kaniu Gly Mo 
fUlph B. Cuter Co.. l52Chu.ber.Sl.. NewYoik 



FOR ROCK DRILLS 

The best lubricant is one 
which has lasting qualities, 
because a rock drill never 
receives proper attention. 

DIXON'S 

Flake Graphite 

Added to the oil used In a drill coats every wearing surface with a 
veneerlike nim of pure graphite which stays on and minimizes 
rrl. tlon and wear even when the oiling Is neglected. Protect your 
drills by lubricating them right. "Graphite as a Lubricant" No. 141 
explains how. 

JOSEPH DIXON CRUCIBLE CO. 

Established 1827 
JERSEY CITY, NEW JERSEY 



NDEROGA AMERICAN 

FLAKE 

GRAPHITE 

{perfect lubricant. 

I ani SwE^cyVwTtT ioHS. 
I joseph oaon caucible co 

JCWStV CITY. U.S.*. 



Page. 

Hendrie ABolthoffMfg.ASup. Co... 2 

Sullivan Machinery Co 57 

Vulcan Iron Work*. 40 

Filter Presses 

Kolly Filter Press Co 7 

Perrin A Co.. Wm. R 80 

Traylor Eng. A Mfg. Co 52 

mten 

Blaisdell Co.. The » 

Butters Patent %ruum Filter Co. . .30 

Chalmers A Williams 82 

Moore Filter Co >o 

Oliver Continuous Filter Co < 

Traylor Eng. A Miff. Co 62 

i Ire Brick 

Atkins Kroll A Co 28 

Braun Corporation Co 27 

BraunKnecht-Heituann Co 27 

Denver Firo Clay Co * 

Harbison-Walker Refractories Co. . .30 
Fittings, Malleable and 

Cast Iron 
National Tube Co * 

I hi ii u - S 

American Spiral Pipe Works 18 

Lunkenlielmer Co 46 

National Tube Co. 9 

Foundry Equipment 

Connersville Blower Co *~ 

lngers«ll-Rand Co _6 

Pacific Foundry Co 51 

Scull in-Galtagher Iron A Steel Co. . .30 

Sullivan Machinery Co 57 

Wellman-Seaver-Morgan Co 57 

Frogs and Switches 

Fairbanks. Morse A Co — 

Johns-Manville Co.. H. W ..AS 

Watt Mining Car Wheel Co 29 

Furnacea, Asaay- 

Braun Corporation. The 27 

Braun-Knecht-Heimann Co 27 

Denver Fire Clay Co 40 

Furnncea, RnnMlng 

Allis-Chalmers Mfg. Co 12 

Hendrie A Bolthoff Mfg. A Sup. Co.. . 2 

Pacific Foundry Co 51 

Power A Mining Machinery Co — 

Steams-Rogers Mfg. Co 51 

Traylor Eng. A Mfg. Co 62 

Wedge Mechanical Furnace Co 6 

Furnaces, Smelting 

Allls Chalmers Mfg. Co 12 

Hendrie A Bolthoff Mfg. A Pup. Co. . 2 

Pacific Foundry Co 51 

Power A Mining Machinery Co — 

Traylor Eng. A Mfg. Co 52 

Wedge Mechanical Furnace Co 6 

Gaa Producers 

Power A Mining Machinery Co — 

Wellman-Seaver-Morgan Co 67 

Gaakets 

American Spiral Pipe Works IS 

Diamond Rubber Co — 

Johns-Manville Co.. H. W 3t 

National Tube Co 9 

Smooth-On Mfg. Co 46 

Geara 

Dodge Mfg. Co M 

General Electric Co — 

Heese A Gottfried Co Back Cover 

Pacific Gear A Tool Co 81 

Generators 

Allis-Chalmers Mfg. Co 12 

Fairbanks. Morse A Co — 

General Electric Co — 

Hendrie A Bolthoff Mfg. A Sup. Co... 2 

Westinghouse Electric A Mfg. Co — 

Glanta. Hydraulic 

See Hydraulic Mining Machinery 

Graphite Products 

Dixon Crucible Co-, Joseph. 36 

Heaters. Feed Water 

Alberger Pump Co — 

Allis-Chalmers Mfg. Co 12 

Blake A Knowles Steam Pump Wks.— 

Dodge Mfg. Co 11 

Fairbanks. Morse A Co - 

HendrieA Bolthoff Mfg. A Sup. Co... 2 

Power Specialty Co 39 

Union Iron Works Co 49 

Holats. Air 

Mine A Smelter Supply Co — 

Nevada Engineering Works 47 

Hoists, Electric 

Allis-Chalmers Mfg. Co 12 

Brown Hoisting Machinery Co- 59 

Demarest Co.. D.D 66 

Fairbanks. Morse A Co — 

Flory Mfg. Co.. 8 30 

General Electric Co — 

Harron. Rlekard & McCone BackCover 
HendrieA Bolthoff Mfg'A Sup. Co... 2 

Hendy Iron Wks. Joshua 58 

Lidgerwood Mfg. Co. 3 

McMaster. D. J 82 

Power A Mining Machinery Co — 

Sullivan Machinery Oo 67 

Union Iron Works Co 49 

Vulcan Ironworks 40 

Wellman-Seaver-Morgan Co 57 

Westinghouse Electric A Mfg. Co....— 
Hoists, Gasoline 

Witte Iron Works Co 47 

Hoists, Steam 

Allis-Chalmers Mfg. Co 12 

Brown Hoisting Machinery Co.. ..'..59 

Demarest Co.. D. D 56 

Fatrt>anks. Morse A Co — 



Page 

Flory Mfg. Co.* S SO 

Ha mm. Kirkanl A MeCone BackCover 
HendrieA Bolthoff Mfg. A Sup. Co... 2 

Hendy Iron Wks. Joshua 68 

Lidgerwood Mfg. Co 8 

Power A Mining Machinery Co — 

Sullivan Machinery Co 57 

Vulcan Iron Works 40 

Union Iron Works Co 49 

Wellman-Seaver-Morgan Co 57 

Hose 

Diamond Rubber Co., The — 

Fairbanks. Morse A Co — 

Goodrich Co.. B. F 4 

I ngersolI-Rand Co . 8 

Johns Manville Co.. H. W 53 

Hydraulic Mining Machinery 

A bend roth A Root Mfg. Co '..50 

American Spiral Pipe Works 18 

Hendy I Ton Wks. Joshua 6ft 

Hydraulic Supply Mfg. Co 62 

Pel ton Water Wheel Co 4? 

Union Iron Works Co 49 

Injectors 

LunkenhelmarCo. . 46 

Powell Co.. William 46 

Iron Cements 

Smooth-On Mfg. Co 46 

J a it Plates 

Allen American Manganese Steel 

Co.. Edgar — 

Chester Steel Castings Co 30 

Chrome Steel Works 16 

Scull In -Gallagher Iron A Steel Co. . .20 
Taylor- Wharton IronASteel Co. ...30 

Van Winkle. H. L 30 

Laboratory Supplies 

See Assayers' and Chemi*(*' 

Supptie*. 
Lnmp*, Arc and Incandescent 

General Electric Co — 

Westinghouse Electric A Mfg. Co....— 
Lend Joint Pipe 

National Tube Co 9 

Locomotives, Electrle 

Atlas Car A Mfg. Co 29 

Baldwin Locomotive Works, The ...46 

Demarest Co.. D.D ...56 

General Electric Co — 

Westinghouse Electric A Mfg. Co — — 
Locomotlven. Gasoline 

Baldwin Locomotive Works 45 

Vulcan Iron Works 40 

Locomotives, Steam 

American Locomotive Co 10 

Baldwin Locomotive Works. The . . .45 

Lima Locomotive Corporation 29 

Vulcan Iron Works 40 

Lubricants 

Albany Lubricating Co — 

Cook's Sons. Adam — 

Dixon Crucible Co.. Joseph 36 

Lubricators 

Albany Lubricating Co — 

Cook's Sons. Adam — 

Dodge Mig. Co 14 

Lunkenheimer Co 46 

Powell Co.. Wm 46 

Magneslte „ 

Atkins. Kroll A Co 28 

Magnetic Separators 

American Zinc Ore Separating Co... 30 

Steams-Roger Mfg. Co 51 

Matte Tapping Cars 

Pacific Foundry Co 51 

Metal, Bearing 

Phosphor Bronze Smelting Co 29 

Metal Buyers and Dealers 

American Metal Co.. The 28 

Atkins. Kroll A Co 28 

Beer. Sondhelmer A Co 28 

Consolidated Mining A Smelting 

Co.. of Canada. Ltd 28 

International Smelting A Rfg. Co... 28 

Mountain Copper Co 28 

Selby Smelting A Lead Co 28 

Swansea Cons. G. A C. Mining Co... 28 
U. S. Smelting. Ref. A MiningCo.. 29 

Vogelstein A Co.. L. 28 

Wildberg Bros 28 

Mills, Ball and Pebble 

Allis-Chalmers Co 12 

Hardinge Conical Mill Co 18 

Traylor Eng. A Mfg. Co 52 

Mills, Chilean 

Allis-Chalmers Mfg. Co 12 

Lane Mill A Machinery Co S9 

Power A Mining Machinery Co — 

Traylor Eng. A Mfg. Co £2 

Union Iron Works Co 49 

Mineral Specimens 

Wilke. K. M 32 

Motors 

Allis-Chalmers Mfg. Co 12 

Fairbanks. Morse A Co — 

General Electric Co — 

Hendrie A Bolthoff Mfg. A Sup. Co... 2 

Hendy Iron Wks Joshua 58 

Mine A Smelter Supply Co — 

Westinghouse Electric A Mfg. Co. ..— 
Motor Trucks 

International Motor Co 

OH and Grease Cups 

Albany Lubricating Co — 

Cook's Sons. Adam — 

Lunkenheimer Co 46 

Powell A Co.. Wm 46 



ily 5. 191 



MINING AND SCIENTIFIC PR! AS 



.(7 



oil 

Hi 

II II. 

Nan. 
*l*r 

TJnlo 

Off 

*». 

4/* 



\% rll Huppllr* 



Iluyrra 

Vrfur Huyrrt and t**aUrg 



" v . . . ,, n . i i , 

Clnwr. H.N — 

Oiyiri I'umpi 

Ell I -r. H N — 

Parkins 

Dltm<in<l Kubher Oo,.,., — 

Johru-Manrllls Co.. R. W is 

Pnp«-r 

Biakw Moffit A Towns 29 

I'afrni Attorney* 

Dswvjr. -■ nf & Oo as 

Atkiiu-Kmll A Oo. ?8 

Prrforntftl Metals 

Al' -'..,'r,i r- M(j. Co U 

California IVrforatlng Scnvn Co... 2>i 

Luillow-Saylor Wire Oo, 36 

PhtMphor llronar 

Phosphor Bronx.- Smelting Co, 39 

I'lpr. Qui Iron 

Central Foundry Co Front Cover 

Plpr Covering? 

Johns-Manrllle Co.. H. W 58 

I'lp.-. Itlvrted 

Ab»ndmth A Root Mfg. Co CO 

American Spiral Pipe Works 13 

Hydraulic Supply Mfg. Co 62 

Plpr. Wood 

Pacific Tank A Pipe Co 5ft 

Redwood Manufacturer* Co 27 

Pipe. Steel 

National Tube Co 9 

Pipe Threading Machine* 

Herrell Mfg. Co 29 

Powder. DlnntlDfr 

Dupont dt-N.-mours Powder Co.. E.I. 45 

Trojan Powder Co - 

Producer, Gaa 

Power A Mining Machinery Co — 

Well man-Sea ver-Morgan Co 57 

Pulley*. Shafting and Hanirer* 

Demarest Co.. D. D 56 

Dodge Mfg. Co ,u 

Fairbanks. Morsel Co - 

Harron. Rlckard A McCone BaekCovr 

Hendy Iron Wks. Joshua 58 

Hyatt Roller Bearing Co 89 

Me»-se .v '-i.ttfri.--l <\i Bnck Cover 

Robins Conveying Belt Co 81 

Well man leaver Morgan Co 57 

Pulverisers 

Ail Is-Chal mere Mfg. Co 12 

Braun Corporation. The 27 

Braun-Kni'cht-neimann Co 27 

Chalmers A Williams 32 

Denver Fire Clay Co 40 

Denver Quartz Mill A Crusher Co. ..29 

Harding* ( onical Mill Co 18 

Hendy Iron Wks. Joshua 5« 

Johnson Engineering Works 43 

Power A Mining Mnchin-Ty Co. . — 

Traylor Eng. A Mfg. Co 52 

Well man-Sea ver-Morgan Co ,i7 

Pumpa 

Alberger Pump Co — 

Allis-Ch aimers Mfg Co 12 

American Well Works '. . '. .44 

Cameron Steam Pump Works A.S. 37 

Connersville Blower Co — 

Deane Steam Pump Co v 

DemarestCo.. D.D 56 

Deming Co., The " 36 

Fairbanks. Morse A Co — 

FrenierA Son " '30 

General Electric Co „ "— 

Harron. Rickard A McCone BackCover 
Hendrie A BolthofT Mfg. A Sup. Co. 2 

Hendy Iron Wks, Joshua 58 

Jackson Iron Works. Byron 44 

Jeanesville Iron Works Co "..44 

Keystone Placer Drill Co ....81 

Krogh Pump Manufacturing Co... . — 

McMaster. D. J 32 

Meese A Gottfried Co Batik Cover 

Mina A Smelter Supply Co — 

Prescott Steam Pump Co., Fred M.. 44 

Taylor Foundry A Eng. Co 59 

Union Iron Works Co 49 

Yuba Construction Co 51 

Quicksilver 

Atkins, Kroll A Co 28 

Braun-Knecht^Heimann Co 27 

Railway Supplier and Equip- 
ment 

American Locomotive Co 10 

Atlas Car A Mfg. Co 2H 

Baldwin Locomotive Wks., The 45 

Fairbanks. Morse A Co — 

Lima Locomotive Corporation 29 

Watt Mining Car Wheel Co 29 



Pave. 

Itr friar ratine M .1, h lurry 

Vulcmn Iron Work* is 

Kraeae \ pparatu* 

Klmer. H.N .— 

ltl*K* aad I»le* 
Am 7aw Mat**. 
M..IU. < ru-hlog 



A I II. 



» Mfg. Vn 19 



mm* 

.ff Mfg A Sup. Co 



iing Marlunery «'., 
ton Iron A Steel Co. 
* Mfg. Co 



Traylor Er 
itixidnar 

Johnft-Mauvllle Co.. R. W 68 

Hope, Manila and Jute 

Brodfrirk A Baseom Rope Co 50 

Dodge Xfjg.Co 14 

U>sclien A Sons. Rope Co.. A 31 

Mease A Gottfried Co. . . .Back Cover 

1; . Wire 

Broderfck A Baacom Rope Co 39 

Don Mfg Co 14 

Leschen A Sons Cope Co.. A 31 

Robins Conveying Belt Co 81 

Roehllng Sons Co . John A 46 

Vulcmn Iron Works 43 

Sampler* 

Braun Corporation. The 27 

Braun-Knecht-Helmann Co 27 

Denver Fire Clay Co 40 

Traylor Eng. A Mfg. Co 62 

s n « Mill Machinery 

Hendy Iron Wks. Joshua 58 

School* and Colleges 

Heald's School of Mines 2« 

School of Practical Mining 26 

Screens 

Allis-ChalmersMfg. Co 12 

California Perforating Screen Co. ..29 

Chalmers A Williams 32 

Ludlow-Saylor Wire Co 36 

Ueese A Hottfried Co BackCover 

Power A Mining Machinery Co — 

Traylor Eng. A Mfg. Co 52 

Tyler Co.. w. 8 — 

Second-Hnnd Machinery 

McMaster. D.J 32 

Separators 

American Zinc Ore Separating Co. . . 30 

Steams-Roger Mfg. Co 51 

Shafting: 

See Putleya, Shafting and 

Hanger 9. 
Sheave* 

Broderick A Bascom Rope Co 59 

Dodge Mfg. Co 14 

Leschen A Sons Rope Co.. A 31 

Meese A Gottfried Co Back Cover 

Rob'ns Conveying Belt Co 3: 

Wellman-Seaver-MorganCo .57 

Shell* and Rings 
See Jaw Piatea. 
Shoe* and Dies 

Chrome Steel Works 16 

Scullin-Gallagher Iron & Steel Co. . .HO 

Union Iron Works Co 49 

Shovel*, Electric and Steam 

American LocomotiveCo 10 

Brown Hoisting Machinery Co 5'.i 

Bueyrus Co.. The 55 

Marion Steam Shovel Co — 

Thew Automatic Shovel Co 51 

Stlex 

Atkins. Kroll A Co 2S 

Smelters and Refiners 

Beer. Sondheimer A Co 28 

Consolidated Smelting A Rfg. Co.. 

of Canada, Ltd 28 

International Smelting A Ref. I fc>..,28 

Selby Smelting A Lead Co 28 

U. S. Smelting. Ref. A Mining Co.. . .29 

Vogelstein A Co.. L 28 

Smelting; Machinery 

Allls-Chalmere Mfg. Co 12 

Hendrie A Bolthoff Mfg. A Sup. Co. . 2 

Pacific Foundry Co 51 

Power A Mining Machinery Co — 

Stearns-Rogers Mfg. Co 61 

Union Iron Works Co 19 

Traylor Eng. A Mfg. Co 52 

Wedge Mechanical Furnace Co 6 

Smoke Hemelts 

Elmer, H. N — 

Springs 

Cary Spring Works 38 

Stamp Mills 

AlHs-Chalmers Mfg. Co 12 

Chalmers A Williams 32 

Demarest Co.. D. D 56 

Fairbnnks. Morse A Co — 

Hendrie A Bolthoff Mfg. A Sup. Co.. 2 

Hendy Iron Wks, Joshua .58 

Power A Mining Machinery Co — 

Traylor Eng. A Mfg. Co 52 

Union Ironworks Co 19 

Wellman-SeaverMorgan Co 57 



Continued on Next Page. 



TUB 8 1. OO AN OP TBS CA MERON - 
•• < ll Alt. \( Ti lt: HIE ORAM) EST THISd. 



CAMERON 

Centrifugal Pumps 




The Cameron Double Suction Volute 
Centrifugal Pump (illustrated) is the 
pump you've been waiting for, as it has 
features of design and construction that 
insure unusually high efficiency and low 
maintenance cost. 

It is of the most modern design, with 
an enclosed impeller that is perfectly 
balanced, and a horizontally split casing 
that permits easy access to all interior 
parts without disconnecting any of the 
piping. 

These pumps are not only made from 
the highest grade materials, and all parts 
most carefully finished by skilled work- 
men, but they are given the severest 
tests to meet maximum requirements. 

They are built in sizes which will 
produce the best results in heads up to 
200 feet, varying in capacity from 50 to 
7,500 gallons a minute, and may be 
driven by motor, turbine, gas engine or 
belt. 

On the PANAMA CANAL Came- 
ron Centrifugal Pumps were adopted 
after exhaustive efficiency tests made by 
the Isthmian Canal Commission. As a 
result of these tests, we have since 
received a further order for a large 
number of these pumps. 

Learn what these pumps can do for you. 
Write for Centrifugal Pump Bulletin No. 18. 



A. S. CAMERON STEAM 
PUMP WORKS 

11 BROADWAY NEW YORK 



38 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 




-The KELLER to BETTER.- 



DURABILITY 



No matter how stable, 
sensitive, and quick 
acting a balance Is 
when It comes from the 
factory, you would not 
buy It unless you knew 
that It would retain 
these qualities. The 
greatest attributes of 
Keller Balances are 
durability , rapidity . 
stablentts, senMitivenet*, 
and potitiveneas. 

"Write tor raised discounts." 



THE SAIT LAKE HARDWARE CO., %tS c,ty - 



The Roessler & Hasslacher 
Chemical Company 

100 WILLIAM STREET, HEW YORK 

Works: Perth Am boy, It J. 

CYANIDE 

98/99 Per Cent. 

CYANIDE OF SODIUM 

128/130 Per Cent. 
. HER CHEMICALS FOR MINING PURPOSES 




Gold Medal Award at St. Loai*. 

lJUu STANDARD OP IQfU 
101V EXCELLENCE 

FOR OVER (0 TEARS. 

Troemner's Improved. 
No. 3 Assay Balance 

V.- -2 inch Beam. Sensibility Vioo Mj. 

Full, clear sweep across 
beam, no obttructions. Fult 
away beam and pan arrests. 
The moat popular and effi- 
cient Assay Balance. All 
agate bearlngB and edges. 

List priee, $95.00. Price List on Application. 

HENRY TROEMNER, PHILADELPHIA, PA., U.S. A. 




Lietz 



ARE FOREMOST WITH THE PROFESSION 
THE fl. LIETZ CO., SAN FRANC I SCO, CAL. 
ESTABLISHED 1882 




ENGINEERING INSTRUMENTS 

BUFF & BUFF COMP \NY 
Jamaica Plain Station, - BOSTON, MASS. 

A. E. FULLER, Seattle, Agent tor Northwest. 

The "Buff" is the result of 50 years of instrument 
Send for Catalogue 31. study by our Mr. Geo. L. Buff— our present manager. 



The ability to nituun their reputation year after year, 
J proof of the continued ■uperiority of 



fl/FK/N MEASURING TAPES 



la Accuracy, Durability and Workmanship they are unequalled. 
Sold by all good dealers. Send for Catalog. 

SAGINAW. MICH.. 

U. S. A. 



New York. N.Y.. and Windsor, Can. 




Page. 

Stamp SlemK and Gulden 

Chrome Steel Work* •. 16 

Demarest Co.. D. D 56 

Steel, Chrome 

Chrome Steel Works 16 

Steel, Drill 

Barron, Kickard A McCone BftckCover 

Steel, Mangfenese 

Allen American Manganese Steel 

Co . Edgar — 

Chester Steel Castings Co 80 

Taylor- Wharton Iron A Steel Co... .80 
Van Winkle. H. L 80 

Steel, Structural 

American Bridge Co 68 

Suction Dredges 

Yuba Construction Co 64 

Superheaters 

PowerSpecialty Co 39 

Tank**, Cyanide 

Abendroth A Root Mfg Co 60 

Hammond Iron Works 35 

National Tube Co 9 

Pacific Tank A Pipe Co 58 

Power A Mining Machinery Co — 

Redwood Mfrs. Co 27 

Traylor Eng. A Mfg. Co 62 

Tapes, Measuring 

Link in Rule Co 88 

Telephones, Mine 

Western Electric Co — 

Thickeners, Slime 

Dorr Cyanide Machinery Co 89 

Traylor Eng. A Mfg. Co 62 

Trnravrays, Aerial 

Broderick A Bascom Rope Co 59 

Leschen A Sons Rope Co.. A 31 

Painter Tramway Co 82 

Rlblet Tramway Co £0 

Roebling's Sons Co.. John A 46 

Vulcan Iron Works 48 

Transit* 

Alnsworth A Sons, William 38 

Bausch A Lomb Optical Co 89 

Buff A Buff Mfg. Co 88 

Lietz Co. A., The 88 

Transmission Machinery 

Dodg-eMfg.Co II 

Fairbanks. Morse A Co — 

General Electric Co — 

Harron. Rickard A McCone BackCorer 

Hendy Iron Wks.. Joshua 38 

Meese & Gottfried Co Back Cover 

Robins Conveying Belt Co 31 

Traylor- Wharton Iron A Steel Co... 52 

Trench Excavating Machinery 

Hayward Co., The 53 

Tube Mill* t 

Allls-Chalmere Mfg. Co 12 

Chalmers A Williams 32 

Hardinge Conical Mill Co 18 

Power A Mining Machinery Co — 

Traylor Eng. A Mfg. Co 52 

Union Iron Works Co 49 



Tubes Page- 
National Tube Co 9> 

Turbines, Hydraulic 

Allis-Chalmers Mfg. Co 12 

Hendy Iron Wks.. Joshua 58 

Pelton Water Wheel Co 48 

Wellman-Seaver-Morgan Co 67 

Turbines, Steam 

Alberger Pump Co — 

Allls-Chalmers Co 1? 

Genenil Electric Co — 

Vnlona 

National Tube Co 9 

Vnlvea 

Connersville Blower Co — 

Lunkenheimer Co . , . .46 

National Tube Co 9- 

Pelton Water Wheel Co 48 

Powell Co.. Wm 46 

Water Wheels 

Dodge Mfg. Co 14 

Pelton Water Wheel Co 48 

Union Iron Works Co 49 

Wellman-Seaver- Morgan Co 57 

Waterproof Coating 

Johns-Manville Co . H. W 53 

Smooth-On Mfg. Co 46- 

Water Softeners 

Dodge Mfg. Co 14 

Weighing Machines 

Merrick Scale Mfg. Co '..50- 

Well Drilling Machinery and 
Supplies 

American Well Works 44 

Broderick A Bascom Rope Co 59 

Harron. Ricki.nl A Mc< one KackCover 

Keystone Plrtcer Drill Co 81 

Star Drilling Mach. Co 48 

Union Iron Works Co 19 

Wheels, Car 

Watt Mining Car Wheel Co 29 

Wire Cloth 

Ludlow-Saylor Wire Co 88- 

Tyler Co.. W. S — 

Wire Cables 

Broderick A Bascom Rope Co 69 

Leschen A Sons Rope Co., A 81 

Painter Tramway Co 82 

Roebling's Sons Co., John A 46 

Vulcan Iron Works 48. 

Zinc Boxes 

Braun Corporation. The 27 

Braun-Knerht-Heimann Co 27 

Denver Fire Clay Co 40 

Hammond Iron Works 35 

Pacific Tank A Pipe Co 58 

Redwood Manufacturers Co 27 

Traylor Eng. A Mig. Co 32 

Union Iron Works Co 49 

Zinc Dust and Shavings 

Atkins. Kroll A Co 28 

Braun Corporation. The 2? 

Braun-KnechtvHeimann Co 2T 

Denver Fire Clay Co » 40 

Roessler A Hasshicher Chemical Co.. 88 



SEND FOR CATALOG 



A-9 ol Balances. 



BX-9 ol Engineering Instruments. 



WHAJNSWOrJH 
• 8f SONS 



a 



THE PRECISION FACTORY 



DENVER. COLO. 
• U.S.A. •! 




CARY SPRING WORKS 

140-242 W. mh SL, NEW YORK CITY 



of every description 



Every requirement in 
Springs. Round and Flat 
Steel Wire. Springs for 
Machinery. 

" Write for Booklet M." 



HERMAN KOHLBUSCH, Sr. 

ESTABLISHED 1859 
170 BROADWAY, NEW YORK 




MANUFACTURER OF 



Fine Balances and Weights 

For every purpose where 
accuracy la required. 
SEND FOB ILLUSTRATED CATALOGUE 



Julv ;.. 1913 MINING AND SCIENTIFIC PRESS 39 




Thompson's 
Gold Balances 

have Ikwii u*.-) fur wore than 

to YEARS by 

Tbe American Smelling A R**f. Co. 



Stratum • tndfpfiideficv. Ud. 
Vindicator Coo*. O M.Oo. 
AJax Gold Mining Co. 



Ther are all uilng our Multiple Rider Attachment. So are hundred* 
of others. Write for catalogut. 



THOMPSON BALANCE CO., DENVER, COLO. 



THE VARNEY GROUP MINER'S 

The one piece \ CANDLESTICKS 

stick made \a 8, 
10 and 12-Inch 
lengths. 




MY POCKET STICK Is the hest thing ever offered In this 
line. Open. 10 Inches. Weighs 1% ounces. Steel, polished. 
Strong, serviceable. 

For descriptive folders and quantity prlceB address 
\. B. \ AKNKY. 1S30 Lawrence St., Denver, Colo. 



The yfte made to measure 

PutmanBootsfe Shoes 





Go on like a qlove«<* fit all over. 



Potman Boots are the oldest and best known boots for 
Civil and Mining Engineers. They are sold oil over the 
world and have justly earned the slogan "The World's 
Standard." Made-to-measure, water proofed or not, 
any weight of uppers or soles, all heights, a variety 
i styles and prices that you will find satisfactory. 

Made-to-Measure Shoes 

Putman Shoes,"have a perfect fit, the best of everything in 
quality, style that is "up-to-the-minute" and that custom- 
made-individuality so much sought in all wearing apparel. 
Lace, Button or Oxford styles. Black and all the popular 
shades of Tan Leathers. Everything from the lightest 
Vici Kid to Heavy English "Hiking" Shoes. 

Our FREE CATALOGUE is sent upon request. It 
is different from any other and will interest you. 
Self measurement blanks and full instructions free 

PUTMAN BOOT & SHOE CO. 
118 5th St. N. E. Minneapolis, Minn. 



THE DORR CLASSIFIER THE DORR AGITATOR 
THE DORR CONTINUOUS THICKENER 

Write for Catalog and Data 

THE DORR CYANIDE MACHINERY COMPANY 

735 First National Bank Building, Denver 

Cable Address "Dorr." Code : Bedford McNeill and Western Union. 

Grothe & Carter, Mexico City, General Agents for Mexico. 
N. Guthridge. Ltd., Sydney, General Agents for Australia. 



FOSTER SUPERHEATERS 

are absolutely fool-proof and furnish uniform 
superheat which prevents all wet steam troubles 
and reduces coal bill by 8% to 25%, depend- 
ing on prime mover In use. Write for proof. 

POWER SPECIALTY CO., Ill Broadway, New York 

Balboa Bdg., SAN FRANCISCO Peoples Gas Bdg., CHICAGO 



Bausch & Lomb 

Engineering Instruments 



are worth careful invexti 
Ration because* of their 
many original features, 

backed by scientilic pro- 
duction and years of prac- 
tical experience. 

Write today for our new 
complete catalogue. Be- 
sides full descriptive mat- 
ter and illustrations it 
contains much historical 
and technical informa- 
tion of special interest to 
the engineer. 




No. 063— 5-inch Transit. 
Reinforced truss standards. 
Cylinder axis bearing, 
Variable power eyepiece. 



Bausch Ipmb Optical (p. 

705 ST. PAUL STREET ROCHESTER. N.Y. 

New York Washington Chicago San Francisco 



The 
Lane Mill 




In several plants Is saving 95 to 98% by amalgamation. The Initial 
and operating costs are less than stamps. 

Full details on request. 

LANE MILL & MACHINERY COMPANY 

Successors to Lane Blow Speed Chilian Mill Company, 
236-247 Douglas Bldg., Los Angeles, California 



50 Percent Saving in 
Power is effected by 
the use of car wheels 
equipped with 

Hyatt Flexible 
Roller Bearings 

Write for Bulletin 604E 

HYATT ROLLER 8EARING CO. 

Newark, New Jersey 

Chicago Office, 1120 Michigan Ave. 




Truax-Hyatt Wheel 



40 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 



C. P. 



Manufactured especially for Cyanide Mill use. 
Used by nearly all large Cyanide Mills. 



j | ) It pays to use strictly chamically pure LEAD FOIL. 

FOIL 



Furnished in all widths. 



Write us today for our prices. 

Made by The Denver Fire Clay Company 

Denver, Colorado — U. S. A.— Salt Lake City, Utah 



Solving The Hoisting Problem^ 




is an everyday occurrence with us. The more complicated the 
situation the better we like it. Here is an example in the electric 
hoist just built for the Woodward Iron Co., Woodward, Ala. This 

Vulcan Electric Hoist 

is for hoisting curs from a slopo. the length of which is approximately 
1800 fL, and its inclination about 30 dog. from the horizontal. The gross 
weight of the cars to be hoisted" is 63,600 lbs. and the lineal speed of travel 

1800 ft. per mln. 

The motor has a full load speod of 290 r. p. m. and the power is transmitted 
to the drum shaft by means of single reduction cast steel machine-cut gears 
of the h'-rriiigbonetype. Write us for complete description. Put your 
hoisting problems up to us. 



VULCAN IRON WORKS 



1734 Main Street, 



WILKES-BARRE, PA. 



Makers of Locomotives, Steam and Electric Hoists and Mining Machinery 



OUR SPECIALTY 



The Denver Hydro Air Compressor 



Cable Address Hydro Denver 
Western Union Code: Un.versal Edition 



Established 1889 
Ratine: See any Commercial Agency 




A 

NEW ONE. 



A 

GOOD ONE 



We guarantee greater efficiency, less cost for installation, no oiling or keeper needed, it being abso- 
lutely automatic. IF YOU have water under head pressure slightly above air pressure required, let us 
tell you how the water can be converted into compressed air without wheels, shafting and belt driven 
machines, with the expense of upkeep and the great loss of power consequent thereto. 

Give our Experts your Water Power Problems 

THE VULCAN IRON WORKS CO., B™° 



1400 West Colfax Ave. 



Denver, Colorado 



July 5. 1913 



MINING AND SCIENTIFIC PRESS 



41 



ALPHABETICAL INDEX TO ADVERTISERS 

< — > I mil «••!•-« Kvrry Ofh#r Urrk or M.n.r.i. A4frrlltra*dl. 



Abrndruih 4 Root Mt*. Ct» £0 

Alnsworth A Son*, William. V 

Albany t.ubrlmflftg Ob.. — 

Altwrgvr iVmp Co — 

Alton Am-rlmn Mangan*-** 

To Kilnr .. — 

AllU-Ch*Im»r» Mfft. Co. U 

Ante r ti-*n HrttlflvOn. ....M 

AnwrtraniilAM Hand Co U 

finu Loratnotlv* 00 i M> 

Am*rt< *n MrutlCo.. Ltd Si 

Am*rlr»n Spiral 1*1 p» Works 18 

American Wrll Wort*. 44 

Amrriran Kim- Or* Sffpamttrur. To JO 

Atkln* Kn>ll A Co 9 

All** Car A Ml*. Co 29 

Bacon. Earl C 29 

Baldwin Locomotir* Works 45 

Bnrtlett A Snow Co., a 49 

Bauw h A Lumb Optical Co X> 

B>*rr SnndhWmerA Co. 2* 

h: * - i. Co 29 

Blakv. Moftli A Town* » 

Brmun Corporation. Tho 27 

Bmun-Ktirt'hi-Hr tmann Co 37 

BmVrtck A Bancom Rope Co 69 

Brown Holding Machy. Co 59 

BucynuComMn* 55 

Buff A Buff Mfg. Co W 

Butter* Patent Vacuum Filter Co. ..30 

California Or. Scmn Co 29 

Cameron Steam Pump Works. A. 3. ..97 

Cmry Spring Works «R 

OMBB A Powell Co 39 

Central Foundry Co Front Cover 

Chalmers A William* 82 

Chester Su*'l « *Mh g> Co Su 

Chicago 1 *nt-u mat lc Tool Co 4» 

Chrome -Steel Works 16 

Coast Mfg. A Supply Co 45 

ConnersxMlle Mower Co — 

Consolidated Mln. A Smelting Co. 

of Canada.. Ltd 28 

Cooks Sons. Adam — 

Delster Concentrator Co ....16 

De later Machine Co 3 

Dean© Steam Pump Co 31 

Demarest Co.. D. D 56 

Darning Co.. The 86 

Denver Fire Clay Co 40 

Denver Quartz Mill A Crusher Co. . .29 

Dewej. Strong A Co 83 

Diamond RuhberCo.. The — 

Dixon Crucible Co.. Joseph 36 

Dodge Mfg. Co 14 

Dorr Cyanide Machinery Co , 89 

Du Pont de Nemours Powder Co.. 
E.I 45 

Elmer. H. X - 

Ensllsh Iron Works Co 56 

Fairbanks. Morse A Co — 

Flory Mlg>. Co.. 8 30 

FrenierA Son ..30 

Gallgher Machinery Co — 

Gandy Belting Co — 

General Electric Co — 

Goldschmidt Thermit Co 45 

Goodrich Co.. The B. F 4 

Gt, West. Smelting A Ref. Co 32 

Hammond Iron Works 35 

Harbison-Walker Refractories Co. . .30 

Hardinge Conical Mill Co. 18 

Harron. Rfckard A McCone 

Back Cover 

Hay ward Co 53 

Heald's School of Mines 26 

HendrieA Bolthoff Mfg.&Sup.Co... 2 

Hendy Iron Works, Joshua 58 

Button A Co.. E. F 28 

Hyatt Roller Bearing Co 39 

Hydraulic Supply Mfg. Co 52 

Inge rsoll -Rand Co 5 

International Motor Co — 

International S. A R. Co 28 

Isbell Mining Machy. Co 8 

Jackson Iron Works. Byron 44 

Jeanesville Iron Works 44 

Johnson Engineering Works 43 

Johns-Manville Co.. H. W 53 

Kelly Filter Press Co 7 

Keystone Placer Drill Co 31 

Kohlbusch. Herman. Sr 38 

Krogh Pump Co — 



Pa«e 

UUdlaw-Ihinn-Gardua CO. — 

Lane Mill A Machinery Co 99 

Le+rhen 6 Son* Rope Co.. A 91 

I.ldgrrwood Mfg. Co 9 

Lieu Co . A 3* 

Lima Lorumottr* Corporation W 

Litm-ott Drilling Co 33 

Ludlow *a)l<>r Wire Co 96 

1 ufkln Rule Co 99 

LuiikenhelnMr CO. 46 

Marion Steam Shovel Co — 

McKieman-Terry Drill Co 37 

McMaster. D.J 93 

A iM.ttlrtiil Co . Km k Cover 

Merrell Miff Co 39 

Merrick Scale Mfa Co An 

Metal* Buying A Refining Co 92 

Mine A Smelter Supply Co — 

Mineral* Sep. Am. 8yn. Ltd 17 

Mineral* Sep. Am. Syu. Ltd.. Com- 

pany Meeting 42 

Mi*>re Kilter Co. 1*. 

Mountain CopperCo 28 

Mulronroy Co.. Inc 14 

Myers. Geo. W 16 

National Service Bureau Inc — 

National Tube Co 9 

Nevada Engineering Works 17 

New York EnffineeringCo 11 

Oliver Continuous Filter Co 34 

Pacific Foundry Co 51 

Pacific Gear & Tool Co 31 

Pacific Tank A Pipe Co 58 

Painter Tramway Co 81! 

Pelton Water Wheel Co 48 

Perrin A Co.. Wm. R 30 

Phosphor Bronze Smelting Co 29 

Pierce. L. S 81 

I ■■ -\*-n Co., Wm 46 

Power A Mining Machy. Co — 

Power Specialty Co 39 

Pre sco tt Steam Pump Co.. Fred M.. .44 
Putman Boot A Shoe Co 39 

Redwood Manufacturers Co 27 

Remington Typewriter Co 13 

Riblet Tramway Co 30 

Robins Conveying Belt Co 31 

Roebling's Sons Co.. John A 46 

Roessler A Hasslacher Chemical Co. 3S 

Salt Lake Hardware Co 38 

San Francisco Plating Wks 33 

School of Practical Mining 26 

Scullin-Gallagher Iron & Steel Co.. .30 

Seattle Machine- Works 47 

Selby Smelting A Lead Co 28 

Smooth-On Mfg. Co 16 

Snow Steam Pump Works 47 

Southorn Pacifc Co.. of Mexico 30 

Standard Diamond Drill Co 80 

Star Drilling Machine Co 48 

Steams-Roger Mfg. Co 51 

Stonehouse, J. W 49 

Sullivan Machinery Co 57 

Swansea Cons. G. A C. Mining Co... 28 

Taylor Foundry A Eng. Co 59 

Taylor- Wharton Iron A Steel Co. . . .30 

Thew Automatic Shovel Co 51 

Thompson Balance Co 89 

Traylor Engineering A Mfg. Co 52 

Troemner. Henry 38 

Trojan Powder Co — 

Tyler Co.. W, S — 

Union Construction Co 55 

Union Iron Works Co 31 49 

U. S. Smelting. Ref. A Mining Co... 29 

Van Winkle. H. L 30 

Varney, N. E 39 

Vogelstein & Co.. L 28 

Vulcan Iron Works Co.(Denver) 40 

Vulcan Iron Wks. IS. F. ( 43 

Vulcan Iron Wks (Wilkesbarre) 40 

Watt Mining Car Wheel Co 29 

Webster Mfg. Co — 

Wedge Mechanical Furnace Co 6 

Wellman-Seaver-Morgan Co 57 

Western Electric Co — 

Westfnghouse Electric A Mfg. Co... — 

Wildberg Bros 28 

Wiley A Sons. John 43 

Wllke. R. M 32 

Wilson A Co.. J. C 28 

Witte Iron Works Co 47 

Wood Drill Works 41 

Worthington, Henry R — 

Yuba Construction Co 54 




PB0FITABLE DRILLING 





000 lock Srills 



Drilling with Wood Drills is profit- 
able for two reasons : 

1st. They can be SAFELY run much 
faster than an ordinary drill, and 

2nd. Owing to the strength of the in- 
dividual parts, the cost of mainte- 
nance is reduced to the minimum. 

It works two ways; you get more 
work and you pay less for it, and 
the reason is, that the Wood Drill is 
an entirely practical tool produced by 
twenty years' experience in designing 
and building rock drills. No drill has 
been put to severer tests than the 
Wood; none has stood them better. 
It has won the confidence of the 
engineering fraternity in all parts of 
the world, and is today admitted to be 
the drill without a peer under any and 
all conditions. 

Write for catalog giving full details. 




noil Brill lorb 

30 Dale Avenue 
Paterson, New Jersey 



AGENTS 
Hammond Mig. Co. 
Portland, Ore. 
Canadian Fairbanks Co. 
Vancouver. B. C. 




42 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 



COMP ANY MEE TING 

Minerals Separation American Syndicate (Limited) 
THE PORPHYRY PROBLEM SOLVED 

Remarkable Results Achieved by the Minerals Separation Flotation 
Process at the Great American Copper Mines 



The 2m> Annual Obdinabv General Meetino was held at 
the offices of the syndicate, G2, London-wall, In the City of 
Loudon, on Monday, June 16, Mr. Jonx Ballot (chairman of 
the syndicate), presiding. 

The Secrftaby (Mr. A. O. Williams), read the notice con- 
vening the meeting and the auditors' certificate. 

The Chaikmar, after dealing fully with the directors' report 
and accounts, said that shareholders have every reason to 
be much gratified with the very substantial progress already 
made, as well as with the very great prospects before the 
syndicate. The two years and seven months since the forma- 
tion of the syndicate have been spent in what may be called 
careful and well considered exploration work, during which 
the great possibilities of our process have been brought home 
to the serious attention of the great copper groups and other 
important mineowners in the United States, Canada, and else- 
where in such an effective and convincing manner that any 
doubts which may have existed hitherto .have now almost dis- 
appeared. 

At the Britannia Mines, In British Columbia, where the 
plant has been in operation for many months, recoveries of 
over 94 per cent, are being regularly obtained, and the man- 
agement of that company say that they will be disappointed 
If they do not get 98 per cent, recovery from their first 600 
tons per day unit, which they hoped to put into commission 
early this month. Later on the Britannia Company purpose 
largely increasing the capacity of their mill and flotation 
plant. 

At the Cuba Copper Minos the whole mill output is also 
now treated with excellent results by our flotation process. 

At the Inspiration Consolidated Mines of Arizona, one of 
the great Porphyry propositions, our 50-75 ton test plant has 
yielded recoveries well in the 90 per cent., with low working 
costf. With the exception of the oxidized capping, every pos- 
sible class and grade of ore in the mine has been tried with 
the same result. From the oxidized capping also we have 
proved that we can get better recoveries and better econom- 
ical results than is possible by any other known method. This 
problem, however, has been very carefully studied, and I 
think that 1 am already justified in telling you today that I 
believe that Minerals Separation has already solved it success- 
fully, and if that is so it will enable us to give as good re- 
coveries from this oxidized material, as from the great bulk 
of the ore in the Inspiration Mine, which can be treated so 
successfully that the mine authorities estimate that by using 
our process they will make an additional profit of over $1,300,- 
000 a year more than by any other known method, as well 
as save $1,500,000 in the first cost of their treatment plant. 
These are stupendous figures In fhemselves, but I am assured 
that they arc even well on the conservative side. 

The Inspiration Company, as you know, is now crush- 
ing about 50-100 tons per day. With that mill they carried 
out an exhaustive series of tests by all known methods in- 
cluding our process, with the result that they decided to take 
a license from us and to install our process. A first section 
of 600-ton per day crushing plant with flotation unit Is now 
in course of erection; this it is hoped will be ready to start 
work by September next. Meanwhile, excavations are in prog- 
ress for a complete mill and flotation plant to treat 7,500 to 
8,000 tons per day. The 600-ton section will be ready long 
before the larger mill can he built, and on its results will 



depend whether the whole output will be treated by our flota- 
tion method. Although the management have adopted this 
conservative policy, I do not think that either their or our 
own engineers have the least doubt as to the final result being 
successful. I. myself, have no doubt whatever, and feel con- 
fident that results of large scale work at Inspiration will 
soon convince the managements of the other great Porhyries 
that our flotation process can and will yield very large addi- 
tional yearly profits from the treatment of the same grade 
of ores over any other possible methods. 

After carrying out tests on his ores, at Elm Orlu, and the 
Colusa-Parrot Mining and Smelting Company, at Butte, Mon- 
tana, that well-known mineowner. Senator Clark, who owns 
these properties, took a license from us for each of them. 
The Elm Orlu Mine adjoins the Butte and Superior. 

Tests on average bulk samples of ores from several of the 
most important groups of big mines in America have indicated 
results so favorable that the mineowners can safely be assured 
that they may expect anything from 20 to 30 per cent addi- 
tional saving of copper from their ores, and I have every 
reason for believing that such saving will be made by us at 
no appreciably, if any, greater cost per ton of ore treated 
than by present methods; even if our royalty be allowed for, 
the profits will reach figures not hitherto thought possible. 

We have carried out most successful tests on parcels of 
ore from several of these great mines. Without mentioning 
any names, I will give you some comparative figures based 
on actual results obtained at one mine by present methods 
and what they would have been if our process had been 
employed. 

The company in question treated 2,852,515 tons of ore dur- 
ing 1912, assaying 1.69 per cent, copper for a recovery of 
68.25 per cent. This yielded a total of 65,881,116 lb. of copper. 
In the tests by minerals separation process the same ore 
yielded a recovery of 85 per cent., or at the rate of 82,049,741 
lb. of copper from the same tonnage treated, which, by assum- 
ing the same grade of concentration and with copper at 14c, 
would have yielded an additional income of $933,639, after 
deducting royalty and cost of reagents and adjusting smelting 
charges; but as a matter of fact by our process we produced 
a grade of 16 per cent, copper against 10.49 per cent, by the 
mining company, so that the actual figures in our favor, after 
deducting royalties, cost of reagents, and adjusting smelting 
charges, would have amounted to no less a sum than $1,795,161. 
These are eloquent figures, which I feel certain may be left 
to speak for themselves. 

I only wish to add that my estimates are based on very 
safe and conservative lines, and that I have every hope that 
the mineowners will soon be convinced when they realize 
these facts, for no efforts will now be spared by us in laying 

Needless to say that important negotiations are already in 
progress with several more very large mines for the adoption 
of our processes. 

The Chairman then formally moved the adoption of the 
directors' report and accounts, which was seconded by Mr. F. 
S Gibes and carried unanimously. Dr. S. Gregory was re- 
elected a director, and Mr. N. M. T. Sondheimer was elected 
in the place of Dr. S. Sondheimer, retired. Messrs. Monk- 
bouse, Stoneham, and Co. were re-elected auditors for the 
ensuing year. 

A vote of thanks to the chairman terminated the proceedings. 



July j, 1913 



MINING AND SCI IN I IFIC PRKSS 



i ; 



JOHN WILEY & SONS, inc. 

432 Fourth Avenue, New York Cily 



London : 
CHAPMAN A HALL, Lid. 



Monlrval, Can.: 
RENOUF PUB. CO. 



Dana's Manual of 
Mineralogy 

For the Student of Klemenlary Mineralogy, 
Ihe Mining Kngiueer, The UeulugUt, 
the 1'ro.ipector, the Collector, etc. 

By WILLIAM E. FORD 

AMt»t»nt Profauor of Mlnoralt«r, Slwfflsld Srlrntlllr School 
of Yalo I'ntvcnilty. 

The different branches of the subject are taken 
up in this book in the following order: 

I. Crystallographic Mineralogy. 

II. Physical Mineralogy. 

III. Chemical Mineralogy. 

IV. Descriptive Mineralogy. 

V. Determinative Mineralogy. 

Thirteenth Edition Entirely Revised and 
Rewritten. Total Issue— 25,000. 

12 mo, viii ~460 pages, 357 figures and 
10 plates. Cloth— $2.00 net. 



A Remington 
Typewriter 
^-Plus 




Here is the machine which 
will do everything that 
i ony typewriter has ever 
done . which will write 
straightaway or tabulate, 
in one or mnny columns , 
' which will do any tabu- 
lar work, however intri- 
cate, with the speed of 
ordinary writing ; 
Which will write and add, 

' ^^^ftkNv and ADDING / and jdd when it writes, in 

, one column or as many columns 

1 \^^(s> ' ^"**— | , — as ihe paper will hold ; 

Which will subtract as cosily as it adds, 
in all or any columns where adding is done ; 
Which is a complete billing, tabulating, adding 
and subtracting machine — all in one ; 
Which is also a complete auditing machine — accurate itself and exacting 
accuracy from those who use it, which will detect errors and prevent 
errors as well ; 

Which establishes a new standard of time and labor saving in every 
variety of combined writing and adding work. 

Remington 

Adding and Subtracting Typewriter 

(Wahl Adding Mechanism) 
Remington Typewriter Company 

(Incorporated) 

New York and Everywhere 

Til ■Ji*-''ff====t a *~ , -*T" 



Vulcan 
refrigerating 



AND 



Ice-Making Plants 




Vulcan Iron Works 

Cor. Francisco and Kearny Sts. 

San Francisco - - California 

SEND FOR CATALOGUE 



MARATHON MILL 




ROLLER BEARINGS 
TO ORDER 



Guaranteed to Bent Any nod All Others Grinding Ore 
and Saving Gold Inside the mill. New Gold Saving Dim- 
charge Head. Mechanical Gold Panning; on a Large Scale 
Beats the Prospector for Close Saving of Values. Grinds 
all ores dry or in water, with Steel Rods Instead of Peb- 
bles or Balls. Great Weight, confining ore between the 
Bars, does two to four times the work of any other mill 
of equal horse power. Slow Speed. No Breakage. Less 
Wear and Tear and Attention. Takes Feed direct from 
Rock Crusher and finishes the grinding to any size from 
coarse cracking to 200 mesh, according to style of mill 
and adjustment, the first time through without any screen. 
Uniform Product. No Oversize to Regrlnd. A strong 
Statement, but the Marathon "Makes Good/' 

Send for Particulars and Catalogue telling "Why and 
How" It does It. 

Johnson Engineering Works 

First National Bank Building, CHICAGO, U. S. A. 

Ublt Addrti., ' •Mt.iLod." Ckicw. All Code, thed 



4 1 



MINING AND SCIENTIFIC PRESS 



July 5. 1913 




Increases the Economy 
of Shaft Sinking. 



Making possible more rapid 
work in the shaft in additicn 
to being the most economical 
pump is the economy you 
buy in an 

"American" 
Turbine Sinker Pump. 

It's perfectly balanced and 
suspended by cables and 
sheaves from a hoisting 
drum at the surface so that 
it can be quickly hoisted out 
of the way of workmen or for 
blasting. 

It's so designed that it will 
not overload the motor under 
variable head and it is fitted 
with grit proof bearings 
above and below the im- 
pellers excluding grit from 
the main bearings. 

It's an improved pump you 
should know more about. 

Catalog 124 by return mail 
if you say so. 

The American Well Works 

General Office and Works: Aurora, 111. 
Chicago, First National Bank Bldg. 



r 



Many Meritorious Features are found only in 
Jeanesville Centrifugal Mine Pumps 




Consider, for Example, 
These Points of Superiority 

Split Casing with Suction and Discharge Openings Id the lower 
Half which permits examining the Interior without disturbing 
piping connections. 

External Bearings with Renewable Split BuBhlngB facilitating 
aligning and repairing. 

Double Suction Enclosed Impellers securing perfect balance 
and the highest efficiency. 

Removable Bronze Wearing Rings around the Suction Open- 
ings, easily replaced whan worn. 

Acid Resisting Metal for all exposed parts when handling acid 
mine water. 

Many other advantages peculiar to the numerous individual 
types we build are explained In Catalog J40-32. 

Perhaps you have a copy. If not, give us your address; 
here's ours. 

Write for Catalogue J 36-32 



THE JEANESVILLE IRON WORKS CO. 



WORKS : HAZLETON. PA. 



New York '"■!!..- IIS Cr 



Branch Offices in all Principal Cities. 



Prescott Mine Pumps 




For capacities under 1200 Gallons per Minute 
up to 500 feet total head this is the ideal mine 
station pump. 

Single reduction Steel Herringbone gears of 
high ratio, — practically noiseless. 

Smaller pinion can be substituted for change of 
capacity. 

Water End center packed plunger type, all 
valves accessible by removal of side plate. 

Straight water passages — especially adapted for 
handling gritty mine water. 

Catalog P-22 on Request. 




115 Broadway, New York Works : Milwaukee, Wis. 

BRANCH OFFICES IS ALL PRINCIPAL CITIES P167.2 



mm 

f 




$-IN. 3-STA0E TURBINE PUMP 



TURBINE 
PUMPS 

for Mines, 
Water Works. 

Suitable for 
operating 
hydraulic giants. 

Send for Catalog 
No. 25. 



Byron Jackson Iron Works, Inc. 

357-361 Market St., San Francisco, Cat. 



LOS ANGEIES 
212 No. Los Ange/es Street 



WORKS 
West Berkeley. Cll. 



'MULCONROY" "The Coupling that never blow, off" 

COUPLING 




BNMfP 



Will not injure lube , ^_ Jt— 

cover ol hose. )". i". 1". U". li". ^| ^FSa 

21" stock sizes for high pressure STEAM. 
AIR or WATER. Write lor illustrated 
lolder and prices. Agents In Principal Cities in I'nited States and Canada 

MaMUcliimd Ml II rONROY m Inr 723 Arch St - 

Onljb, IVIUIAAJPIKUI V^W. ( IRC, p n ^| a( j e |phia, U.S. A. 



MINING AND SCIENTIFIC PRESS 



Gardner Crusher and Pulverizer 



For Laboratory Work 




This Crusher is adapted for grinding any 
material, wet or dry, to any desired degree of fine- 
ness, ranging from 2'." to 20-mesh and under. 

For laboratory work it is especially desirable. 
The hopper can be closed so that nothing will be 
lost and it is built exactly like the larger machine, 
with necessary changes for laboratory use. Small 
power required. Easily cleaned and always re- 
liable. Send for catalogue giving full information. 

C. O. BARTLETT & SNOW CO. 

Cleveland, Ohio 



We Protect Our Customers 

by having made possible 

CELAKAP 

A scientific preparation for sealing the joint of Cap 
and Safety Fuse when blasting in wet or damp places. 

The use of Celakap reduces "misfires" to a minimum. 

For Prices, etc., apply to your 
Powder Company or Dealer. 

Coast Manufacturing and Supply Company 

DISTRIBUTERS 
LIVERMORE, CAL. 



G 
B 



00D REASONS FOR USING = 

Du Pont Electric Fuzes 



ECAUSE 



QUR Blasting Sup- 
plies Catalog gives 
valuable information 
about Electrical Blast- 
ing and the necessary 
equipment. Ask. (or 
Blasting Suppliei Cat- 
alog No. I 19. 



Complete detonation is insured. 
They increase the execution of ex- 
plosives. 

Their strength tends to of lset dete- 
rioration due to improper storage. 
Fumes from explosives are re- 
duced to a minimum. 
The size and duration of flame is 
lessened. 

Prevention of burning of charge 
is accomplished. 

The liability of a misfire is greatly 
reduced. 



E. I. DU PONT DE NEMOURS POWDER COMPANY 

Wilmington. Delaware 



Established 1802 



Pioneer Powder Makers of America 




Use THERMIT and You Will Not 
Have to Buy New Equipment 

Thermit welding is quick, easy and 
effective. Broken sections of wrought iron 
or steel can he repaired in a few hours at 
slight expense. 

The shaft in the ahove illustration was 
repaired in 79 hours, at one-third the cost 
of a new one. 

Full information is given in our Pamphlets 2133, 
2933 and "Reactions." Shall we send them? 



GOLDSC HMIDT THERMIT COMPANY 

WILLIAM C. CUNTZ, Gen. Mgr. 

90 West St., New York City 

432-436 Folsom Street, San Francisco 
103 Richmond Street. W.. Toronto, Ont. 
7300 So. Chicago Ave., Chicago 



INDUSTRIAL 
LOCOMOTIVES 

must frequently operate under difficult conditions, 
and must be specially designed to suit the service. 
We have had experience in building locomotives 
for all kinds of industrial work. 





Mogul locomotive for the Republic Iron and Steel Co. 

The locomotive illustrated is operating on 36 
degree curves and grades of 4 per cent., and is 
suitable for freight or heavy switching service. 
It exerts a tractive force of 34,600 pounds, and 
weighs with tender 255,000 pounds. 

The Baldwin Locomotive Works 

PHILADELPHIA, PA., U. S. A. 

Cable Address: "Baldwin, Philadelphia." 
BRANCH OFFICES : 
St. Louis, Mo., Wright Bldg. New York. N. Y., 50 Church Street 

Chicago. HI.. Railway Exchange Richmond, Va., Travelers Bldg. 
Portland, Ore., Spalding Bldg. San Francisco, Cal., 310 Sansome St. 



46 



MINING AND SCIENTIFIC PRESS 



July 5. 1913 



ASK YOUR DEALER FOR 




( ^specially The" While Slar'Valv e) 




The Powell 
White Star Valve 

Exclusively combines 
these practical features: 

Reversible 

Regrindable 

Renewable 

Xon-C'orrosive "Powell- 
ium" Disc. 

Union bevel ground 
joint connecting body 
and bonnet. 

Threads on outside of 
body where steam can't 
reach them. 

Steam can be packed 
under pressure. 

Notice the white wheel 
designed to give a firm, 
cool grip. 



The a Wm. Powell Co. 




f\ DEPENDABLE Engineering Specialties. 
CINCINNATI 



f^fAWmr.s'cSSSfr '~l>6&S&Si' 

LUNKENHEIMER 
"VICTOR" GATE VALVES 

Made in Standard, Medium, 
Heavy and Extra Heavy Iron 
Body Brass Mounted Patterns, 
"Puddled" Semi- steel and 
Cast Steel, with either Sta- 
tionary Stem or Outside Screw 
and Yoke, and with or without 
By-pass. 

The valves are double-seated, 
can be packed under pres- 
sure and all parts subjected to 
wear are renewable. 
' Lunkenheimer "Victor" Gate 
Valves are made entirely of 
iron for use in handling cy- 
anides and other acids which 
attack brass. 
Specify and insist upon securing genuine Lun- 
kenheimer make. Do not accept substitutes— 
they are never as good as the genuine. 

Your local dealer can furnish them ; if not, 
write us. 

Write for cafafogue 

THE LUNKENHEIMER COMPANY 

Largest Manufacturers of High Grade 
Engineering Specialties in the World 

Genera/ Offices and Works i 

CINCINNATI, OHIO, U. S. A. 

New York: frl-68 Fulton St. Chicago: 186N. Dearborn St. 
Boston : 188 High 8t. London. S.E. : 85 Great Dover St. 

MM 




Wire Rope 



Made from thoroughly 
tested wire in accord- 
ance with designs 
developed by the 
experience of 
many years. 



JOHN A. ROEBLING'S 
SONS CO. 



OF CALIFORNIA 



San Francisco 
Seattle 



Los Angeles 
Porland. Ore. 



THE LARGEST STOCK ON THE 
PACIFIC COAST 




SMOOTH-ON 



IRON CEMENTS 

No. 1, No. 2 and No. 3 

Permanently stop all leaks of steam, 
water, fire or oil in iron or steel cast- 
ings, boilers, tanks, piping, pumps, 
screw-thread joints, flanged joints, etc. 
They are easy to apply, harden quickly 
and make permanent repairs, proved 
by years in use. 

Every Engineer should read our new 
No. 12 Illustrated Instruction Book 



SMOOTH 

Manufacturing 

JERSEY CITY, N. J 



36 Sacramento St. 
SAH FRAHCISCO 



231 N. Jefferson St. 
CHICAGO 




SEND 



THIS 
FREE 
BOOR 



July 5. 1913 



MINI Vi AND m II N I IFIC 1'KI-S.S 



47 



Hoists For Lower 
Prices Than Ever 



Do your hoittirtf at leas coat. For 

26 yearn my I m i - i .ii.- machines 
ha\e proved their »u|>eriorlly in 
mine work everywhere — reliable 
iteration at a less cost per ton-fool 
lift. I make them even 
better now, and what is 
more, I Hell them lower 
than ever. 



WITTE HOISTS 

G4SOLINE, (i VS AM) OIL 

Scvco regular sizes, 10 HP. to 40 HP. BtMl dnonJ, 0a[nV Its 
60U to 1«U It. cable, t llullt m<ctlonal on onkT. » SdchmI vnrlaMf ui will of 
op.- r* lor. Ivpth iu<ll<-nlor «ho\\> tiiirkrt position*. Knelix-* ht.v<- 
vertical valves, • n h in Mparate poeketi separable cylinder*. 
ad|u*tabtc length connecting rods nn.l phosphor bronze 
bearings. w<wrimr part* In small units lo permit parc-vl i»»sl -Ifllvory 
Most durable construction and continuous sat- 
isfactory service. 

Wrlif (or "cut-in-two" prlciw. with full tleM-rlpUons. 

ED H. WITTE, WITTE IRON WORKS CO. 



2409 Oakland Ave. Kansas city, Mo. 





THE JOHNSON AUTOMATIC 
DREDGING SCRAPER 



PATENTED 




{JJ This Dredging Scraper is particularly- 
adapted for Placer Mining in localities 
where the operation of a regular Dredge 
would be too expensive — and for dredging 
small creeks and rivers. Made in any size 
required. 

Manufactured by 

Seattle Machine Works 

37 to 51 West Lander St., 
SEATTLE, WASH. 




A 

Power 
Windlass 



Would save you a lot of time and money if it 
could be quickly set up where you wantiit, 
and if it did not require a skilled operator. 

You could use a cable on the drum for hoisting 
muck out of your winze, or you could throw 
a rope over the gypsy for pulling tools and 
timbers up into your stope. 

The NEVADA WINZE HOIST is giving 
excellent service in just this work in 
some of the greatest mines of the 
country. 

Our Bulletin for the Asking. 

NEVADA ENGINEERING WORKS 

RENO, NEVADA 
Manufacturers of the Hyatt-Nevada Ore Car. 



The Snow Oil Engine 

will reduce your power bill 



50 to 1500 
H.P. 




M: C 



— — 



These Snow Engines will operate on the Cheapest of 
Oils with the Lowest Fuel Consumption of any known 
type of Prime Mover. 

Its service is reliable. 

A special feature being the type of combustion which 
causes the engine to run evenly and quietly, the exhaust 
being free from odor and invisible. It is particularly 
adapted to close regulation, consumes no fuel when not 
in operation and is available forinstant use. Controlled 
by a single lever, the Snow Oil Engine is the most 
economical and practical internal combustion engine on 
the market. 

Send for Bulletin No. S110-32 for complete detail 
information. 

Snow Steam Pump Works 

New York Office : 115 Broadway Work. : Buffalo, N. Y. 

Branch Offices In All Principal Cities 120-? 



4< 



MINING AND SCIENTIFIC PRESS 



July 5. 1913 




CHICAGO PNEUMATIC 
M-CE Compressor 

installed by the Seattle Construction and Dry 

Dock Co., Seattle, Washington. 

Capacity 1538 Cubic Feet 
of Free Air per min. 

The Greatest Possible Value 

in Total Efficiency 

WE MAKE THE BEST IN COMPRES- 
SORS OF ALL SIZES AND TYPES. 

Chicago Pneumatic Tool Co. 

Address N. E. OTTERSON 
71 First Street, San Francisco 



STAR PORTABLE 
DRILLING MACHINES 



Built in many sizes both traction and non- 
traction, for drilling all depths to 4000 feet 




Equipped For Steam, Gas or Electrical Power 

For Water Wells— Oil and Gag Wells— Mineral Prospect- 
ing— Railroad and Canal Excavations— Cement and 
Crushed Stone Quarries— Bridge Soundings — Coal Mine 
Ventilation — Irrigation, Etc. 

Write for Illustrated Catalog. 

The Star Drilling Machine Company 

General Offices : Akron, Ohio 
Branch Office : 108 Fulton St.. New York City 

Works : 

Akron, Ohio— < hanute, Kansas— Portland, Ore.— Long Beach, Cal. 




Pelton Francis Turbines 

have high initial efficiency and maintain it, 
because — the mechanical design is carefully 
adjusted to hydraulic conditions. 

The regulating mechanism is simple, rugged 
and easily adjusted for normal wear. 

The flow lines are smooth, diverting the 
water without shock or jar, thus reducing 
vibrational stresses to a minimum. 

May we explain PELTON designs 
to you more fully? 

Pelton Water Wheel Company 

89 West Street 2229 Harrison Street 

New York 2 San Francisco 



CYANIDE PRACTICE 
IN MEXICO 



Ferdinand McCann 

Aathor of 'Beneficio do Metales de 
Plata y Oro por Cinnuracion' 
and 'Gula Minora.' 




199 Pages. J* J* 39 Illustrations. 
2 Folding Plates. Cloth, 6x9 in. 



$2.00 



An accurate detailed description of the equip- 
ment and practice at all of the Important cyanide 
plants In the Republic of Mexico is given In this 
book. It Is In part a translation of the author's 
book In Spanish — 'Beneficio de Metales de Plata y 
Oro por Clanuraclon.* There has been a revision 
as well as a translation of the material appearing 
In that book, so that the practice described is the 
latest. It contains more Information on the cya- 
nldation of silver ores than any other book. The 
Illustrations have been carefully selected and In- 
clude the flew sheets of many representative mills. 

Published and for Sale by 

MINING AND SCIENTIFIC PRESS 

420 MARKET ST., SAN FRANCISCO. 
THE MINING MAGAZINE, 819, Saliifctiry House, London, E. C. 



July ... l'JU 



MIM.Vi AND Si II N 1 II IC I'UI SS 



I 1 ' 




Cubic 
Yards 



Running 
Time 



Oct., l»H, 70.000 — 


Nil 


Nov., " 57.408 — 


84', 


Dec. " 79,600 — 


S3', 


Jan., 1912, 65,384 — 


80', 


Feb., " 43,300- — 


78', 


Mar., " 61,74* — 


82% 


AveraRe, 62,906 — 


82.1% 



"NOTE. During the month 
of February it was 22" F. be- 
low zero. 



ACTUAL RESULTS ARE WHAT COUNT 

Read the above yardage and running time made by one of our 

5-ft. open type Gold Dredges operating in Idaho. 

The latest dredge built in the Oroville field was made by the 

UNION IRON WORKS CO. 

SAN FRANCISCO 




Before 

AND 

After 

the installing 
of the New- 
est Thing out 
in Mine 
Equipment 

ENAMELED 
STEEL 

Mine Bell 

Signals 




Complete Signal and Sign Equipment 

3d Level El Puo Mine— Cripple Creek, Colo. 

Enameled Steel Mine Signals made in any State, foreign 
or Special Code, other signs for mines, any copy — very 
legible and guaranteed to withstand all underground 
conditions — blue ground, white letter. 



J. W. STONEHOUSE 



SIGNS 
FOR MINES 



907 18th St., Denver, Colo. 




50 



MINING AND SCIENTIFIC PRESS 



Julv 5. 1913 



ROOT spir r 1v l eted pipe 



The Standard Pipe For Mining Service 

For more than forty years Root Spiral Riveted Pipe has been 
recognized as the standard of pipe quality for mining service, 
used all over the world. 

Its Light Weight is of especial value for transportation and instal- 
lation in difficult, inaccessible mining districts. 

Its Spiral Seam gives it a strength and rigidity which is not 
equalled by any other sheet metal pipe. 

Its Patent Joint gives a line of great flexibility which can be laid 
over the most uneven ground and which will stay tight even 
under considerable distortion and shifting. 

Its Great Durability is attested by the fact that lines laid more than 
thirty years ago are as good today as when they were laid. 

You get the greatest pipe value in Root pipe — for water supply, 
hydraulic mining, irrigation, ventilation, compressed air or ex- 
haust steam lines. 



ROOT WA ^ R BE 



BOILERS 




ABENDROTH & ROOT MANUFACTURING CO. 



Sales Office, 50 Church Street, New York City 



Works at Newburgh, N. Y. 




Just A Moment, Please- 

Before you sijm that order for Conveyors 
be absolutely certain it includes the 

Merrick 

Conveyor 

Weightometer 

THIS TRULY WONDERFUL DEVICE 

Will automatically and .continuously record in any unit desired, the exact weight of 
material transported by your belt, bucket or pan conveyors with a guaranteed accuracy 
WITHIN ONE PER CENT. 

It is easily installed; requires no attendant: particular attention given to durability; 
free from complex motions and complicated parts; protected from dust and dirt; weighing 
is as accurate for an intermittent as for a uniform load. 

The Weightometer has received the endorsement of the U. S. Bureau of Standards, 
and has been approved by the British and Canadian Governments as a legal weighing 
instrument for purposes of trade. 

Write for list of users. 

Merrick Scale Manufacturing Company 

PASSAIC, N. J. 



July :>. Iftlfl 



Ml MM". AND M I, N I MR I'KI.SS 




NEW HERRESHOFF 

PRESSURE AIR COOLED 

ROASTING FURNACE 

PATENTED 



Advertising men say — this half page 
isn't enough space to properly feature 
the many live points of our furnace. — 
Send us an inquiry with your require- 
ments and help us to " Fool Em." 



PACIFIC FOUNDRY COMPANY 

SAN FRANCISCO 

COAST REPRESENTATIVE 

HERRESHOFF FURNACE DEPARTMENT 
OF 

GENERAL CHEMICAL CO. 
NEW YORK CITY 



THE EDWARDS ROASTER 




Is being successfully adapted to every roasting problem — as evidenced by recent sales to : 

The Golden Cycle Mining Co. (9th machine) , for roasting Sulpho-Telluride Ores. 
The Goldfield Consolidated Mines, for roasting Concentrates. 
The International Nickel Co., for roasting Copper Ores. 

EXPLAIN YOUR CONDITIONS AND REQUIREMENTS TO 

The Stearns-Roger Mfg. Co. : Denver, Colo. 

MANUFACTURERS OF MINING AND MILLING MACHINERY. 



92 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 



TRAYLOR GYRATORY CRUSHERS 




INDICATIONS OF SUPERIORITY 

The recent orders we received for GYRATORY 
CRUSHERS were secured without any competition, 
while only a couple of years ago we had to fight hard. 

THERE ARE REASONS 



We also build a full line of Stamp Milling, Concentrating 
Cyaniding and Smelling Machinery. 



Traylor Engineering & Manufacturing Co. 

New York Office: 36 Church Street Works: AUentown, Pa. 

Western Office : Paulson Bldg., Spokane, Wash. 



HarroD, Rtckard A McCone, Los Angeles, San Francisco 



Mexican Steel Products *fc Mchy. Co., Apartado 122 Bis., Mexico City 



Hydraulic Mining Machinery 

X 




DOUBLE-JOINTED BALL-BEARING GIANTS 

Showing Giant with Weighting Attachment 

Riveted Iron and Steel Pipe Gravel Elevators 
Riffles Gates Giants Water Lifts 
Steel Sluices Penstocks 



These are the advantages we offer : Promptness in filling orders, 
careful packing to economize freight space and insure delivery in 
good condition, personal supervision of shipment and for our out- 
put, first class material made up by first class workmen. 

WRITE FOB CATALOGUE 

HYDRAULIC SUPPLY MANUFACTURING CO. 

SEATTLE, WASHINGTON 



July .">. 1813 



MINING AND SCIF.N I II K I'KI » 



M 



Which Would You Rather Do— Buy a New Mine 
Pump or Protect Your Steam Pipes? 

It is remarkable how many long steam pipe systems are left 
bare or poorly insulated. In mines where such is the case the 
underground pumps receive steam in a state of about 40 percent, 
efficiency. And frequently twice as many pumps are used as 
would be necessary if the steam pipes were properly insulated with 

J-M Asbesto- Sponge Felted 
Pipe Covering 

Pipes insulated with this covering have carried steam over 5000 feet with 
practically no loss. Unlike other pipe coverings, it will not crack, break or 
lose its insulating value through vibration or rough usage. It has been 
found in perfect condition after more than 15 years' service on underground 
pipes. 

If you value economical mine management, write our nearest branch 
today for Sample and Catalog No. 100. 

H. W. JOHNS-MANVILLE CO. 




/U»/UC> 



MANIKAcTTRERS OF ASBESTOS 
AND MAUKE8IA PRODUCTS 



ASBESTOS 



ASBESTOS KOOKINOS, PACKINGS 
KLECTRICAL SUPPLIES, ETC. 



Albany 
Ba Iti floor- 

Boston 



Buffalo 
chit-ago 

Cincinnati 



Cleveland 

Dallas 

Hotroit 



Indianapolis 
Kansas City 
Los Angeles 



Louisville 
Milwaukee 

Minneapolis 



New Orleans 
Now Yi irfi 
( Mini ha 



Philadelphia 
Pittsburgh 
San Kraucisco 



Seattle 
St. Loin's 
Syracuse 



THE CANADIAN II. W. JOHNS-MANVILLE CO.. LI MITED— Toronto— Montreal — Winnipeg— Vancouver 




HAYWARD 
BUCKETS 



Clam Shell Orange Peel 
Drag Line 



They do the greatest amount of digging in the least time, and at the smallest 
cost. Leading contractors indorse them. Our catalog will give full details 
and much information valuable to you. 



THE HAYWARD COMPANY 

SPECIALISTS IN DIGGING MACHINERY 
SO Church St. New York 



54 MINING AND SCIENTIFIC PRESS July 5, 1913 




15 Cu. Ft. All Steel Dredge Designed and Built for Xatomas Consolidated of California by The Yuba Construction Co. 

We are prepared to design and erect gold dredges with either steel or wooden hulls and equipped with buckets of 
from 1£ cu. ft. to 15 cu. ft. capacity. Each dredge incorporates special features suiting it to the ground in which it is 
to operate. 

We represent the Bucyrus Co. for Placer Dredge Machinery in the West and Orient. Representatives in California for Bucyrus Drag Line. 

THE YUBA CONSTRUCTION COMPANY 

Caiman Bldg- Seattle. Wash. 311 California St., Sail FrailClSCO, Cal. Works. MarysvUle, CaL 



THEW SHOVELS FOR DITCH CONSTRUCTION 

Hydraulic mining methods for placer work frequently necessitate the construction of ditches under conditions 
involving excessive costs for labor and teams. Ordinary excavating machinery cannot be employed, not being adapted 
for light work, and further being precluded by the expense and difficulty of transportation. 

The Special No. Thew Shovel 

shown here is designed to meet these requirements. 
It weighs only twelve tons, and when dismantled the 
heaviest package need not exceed two tons in weight. 
It has a dipper of five-eighths yard capacity, swings 
through a complete circle and may be mounted 
either upon traction or car wheels. The boiler per- 
mits the use of coal, wood or oil as fuel. 

Under the conditions shown in the cut, the shovel 
averaged over 150 cubic yards per shift. In sur- 
face excavation this can be doubled or tripled under 
favorable conditions. 

DITCH CONSTRUCTION IN ALASKA 

Shovels for all Classes of Mining Operations 

EQUIPPED FOR 

STEAM, COMPRESSED AIR OR ELECTRICITY 

WRITE FOR INFORMATION 

THE THEW AUTOMATIC SHOVEL COMPANY, 

LORAIN. OHIO 




July 1913 



MINING AND m II N I II K I'KI SS 







Your special 
equipment 
problems can 




^2? — ! -— _ 


be solved by 
our Engineers 




Cut shows a 1y± cu. 
ft. flume dredge, 
gasoline driven, de- 
signed to dig ground 
from 5 to 25 ft. deep. 


Built for Ruby Dredging Co., Solomon, Alaska. Constructed in season of 1912 and operated suc- 
cessfully 50 days. Guaranteed capacity 1000 cu. yds. per 24 hours. 

Placer mining dredges for gold and tin — from the smallest to the largest sizes. Send for catalog and 
description of these and other dredges. 

Union Construction Company 

H. G. PEAKE 604 Mission Street W. W. JOHNSON 

(Tattlini Union and Bedford McSelll Codes. San FranClSCO, California Cable Address: "Cnconco." 

Consulting Engineers on Dredges ior Fraser & Chalmers, London, Eng. 



BUCYRUS PLACER DREDGES 




15 foot Plater Dredge - Natomas Consolidated of California 

We have built more placer dredge machinery than 
any other manufacturer in the world. 

Our designs are backed up with an experience as 
old as the industry. 

new york BUCYRUS COMPANY Birmingham 

CHICAGO P. O. BOX O, SOUTH MILWAUKEE, WIS. DULUTH 

14 . 2 THE YUBA CONSTRUCTION CO., SAN FRANCISCO 

Representatives In Western United States, Canada, Philippines, Japan and China 



MINING AND SCIENTIFIC PRESS July 5. 1913 




Pacific Stamp Stem Guides 



Simple There are but two independ- 
^ ent parts — the Guide Frames, 
on which no wear comes and the Guide 
Shells that are renewable. 

Labor No bolts, nuts, keys, wedges 
C • or other devices are necessary 
*> to secure Pacific Guides to 
the Guide Frame. They require but a 
casual inspection from the operator. 


Durable Pac j fic f" ide L Frames a ? 

made or the best materials 
and as no wear comes on them, their life 
is practically unlimited. 

Machine P acmc Guides are not 
P" " V» A mac ^ e U P or rou gh castings 

rimsnea but are machine nnis h e d 

hke an engine. The advantages are 
obvious. Ask for Guide Circular No. 27 


D. D. DEMAREST COMPANY 

503 Market Street San Francisco, California 



TAIL ROPE HAULAGE 

Is a mining operation for which electricity is 
especially adapted. 

We make a complete line of hoists for haulage, 
with or without tail ropes, electric driven and with 
special controls to suit conditions. 

ORE HANDLING WITH 
CLAM SHELL DERRICK 

Is another mining operation in open cut or in rehandling that is especially easy to 
install with electric driven hoists, making a flexible and easily moved installation. 

Ask for bulletins anS prices covering our fine of two and three drum derrick hoists 
with boom swing attachments. 

ENGLISH IRON WORKS COMPANY 

KANSAS CITY, MO. 

SALES AGENCIES 

In all the principal mining centers 





July 5. 1913 



MIMV. ,\\P >< U N 1 11 K I'KI .s.S 



Going Up? 



-or— 




For back stoping or 
raising with speed 
and economy of time, 
labor and power, 



use 



Sullivan Air- 
Feed Stopers 

4 Styles:— 

"Standard," "Hardground," 
"Softground" 
"Air-Jet Drifter" 

Bulletin 1366G 
AIR COMPRESSORS HOISTS 



Sullivan Machinery Company, 



Going Down? 

hor sinking 
shafts or win- 
zes, for cut- 
ting trenches, 
lifting floor, 
or block-holing try 
a few 

Sullivan Air- 
Jet Sinkers— 

or BLOCK HOLERS, 
or HITCH CUTTERS. 
They run smoothly. 

New Bulletin No. 1366L 

ROC 1C DRILLS DIAMOND CORE DRILLS 

461 Market St., 
San Francisco, Cal. 




BE 



IffiyfELLr1AN-5EMR-M0RGAN CO. 



WEUIIAN-JEMER-nORMN 
E.NGINE.ERING DIVISION 



ENGINEERS AND MANUEACTURERS^I 7 StftToS 



NON-DETACHING CORLISS VALVE GEAR HOIST 

When Buyers of 
Mine Hoists want 

HIGH GRADE MACHINERY 

they send their orders 
to this Company 

Our Catalogue, just off the press, 
gives an interesting list of the 
Class of Buyers we have been 
serving for the past 

THIRTY YEARS 

This handsome publication will be mailed to you on request. 




CLEVELAND, OHIO, U.S.A. 

NEW YORK, Hudson Terminal. DENVER, 611 Ideal Building. MEXICO, D. F., Apartado 1220. 



50 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 




For two generations wood pipe has served for 
the carrying of liquids economically 

It does its work with a cheap first cost and the main- 
tenance is hardly noticeable. Our wood pipe does not 
corrode, crack or chip. Friction is l<»w. No experience 
and little or no excavation necessary. Man or mule can 
transport. 

The working value of your files will be increased by 
having our literature on tanks and pipes. Both booklets 
are complete and attractively illustrated. Both free. 

Send for Mining Catalog No. 7— Also Booklet "Wooden Pipe : lis Many Advantages." 



Pacific Tank & Pipe Co., 



Address Nearest Office, Dept. K Officea : 

Fifth and Bryant Sts., San Francisco, Cal. 
Kenton Station, - - Portland. Ore. 
464 Equitable Bank Bldfc.. Los Angeles. Cal. 




(San Francisco, Cal. 
Factories- Portland, Oregon 
I Los Angeles. Cal. 



HYDRAULIC MINE EQUIPMENT 

Our experience covers 
more than 50 years 
in the DESIGN and 
BUILDING of 



Hydraulic Mine Equipment 




to meet various conditions and for all purposes, including 

HYDRAULIC ELEVATORS and WATER LIFTERS, GIANTS, WATER 
and RESERVOIR GATES, PATENTED RIFFLES and NON-EROSIVE 

STEEL PLATES FOR SLUICE BOXES 
Riveted Steel Pipe. Hydraulically Operated Derricks. Pumps, Turbines and Water Wheels. 

JOSHUA HENDY IRON WORKS— 75 Fremont St., SAN FRANCISCO, CAL. 



American Bridge Company of New^ork 

Hudson Terminal-30 Church Street, NeWork 



c Manufacturers o/ Steel Structures of all classes 

particularly BRIDGES AND Buildings 




NEW YORK. N. Y-, Hudson Terminal. 
30 Church Street 

Philadelphia, Pa., Pennsylvania Building 

Boston, Mass. John Hancock Bldg. 

Baltimore, Md., Continental Trust Building 

PITTSBURGH, PA. . . Prick Building 

Rochester, N. Y. Powers Block 

Buffalo, N. Y. . . Marine National Bank- 

Cincinnati, Ohio . . Union Trust Building 

Atlanta, Ga Candler Building 

Cleveland, Ohio . Rockefeller Building 

Detroit, Mick., Beecher Ave. &M.C.R.R. 



CHICAGO, ILL.. Commercial National 
Bank Building 

St. Louis, Mo., Third Nat'! Bank Building 

Denver, Colo. , First Nat'l Bank Building 

Salt Lake City, Utah, Walker BankBuilding 

Duluth, Minn. .... Wolvin Building 

Minneapolis, Minn. , 7th Ave. & 2d St. , S. E. 

Pacific Coast Representative: 

U.S. Steel Products Co. , Pacific Coast Dpt. 

SAN FRANCISCO, CAC, RiaJlo Building 

Portland, Ore. . Selling Building 

Seattle, Wash. .4th Ave. So.. Cor.Conn. St. 



Export Representative: United States Steel Products Co., 30 Church St., N. Y. 



.1 111 X 



MINING AND SCIENTIFIC PRESS 



59 




Have you ever considered using a loco- 
motive crane at your mine or mill? 

Being self-propelled and having complete rotation 
of the boom, it will handle all your ore and other 
material rapidly and at a low cost. The illus- 
tration shows a Brownhoist crane loading ore, 
1/4 to 3 tons at a load, with only one man, the 
operator, of the crane. 

Our catalog thotot (his crane in tut 
at mine* and millt. Write for it. 

THE BROWN HOISTING MACHINERY CO. 

CLEVELAND, OHIO 

New York Pittsburgh Chicago San Francisco 



Established 1861 



Incorporated 1906 



Triplex Electric Station Pump 




Capacity 150 Gallons 600 Feet. 



All the QUALITIES your pumping plunt demands 
are in a TAYLOR PUMP. 

If you demand economy in your installation, you will 
get it in a TAYLOR. H is so well built, with so 
few parts, that the maintenance cost is the low- 
est possible. 

If you demand reliability in your pump, you will get 
it in a TAYLOR, It has proved its reliability 
in actual operation under the most exacting and 
severe working conditions. 

SEND FOR OUR CATALOGUE. IT'S FREE. 

Taylor Foundry & Engineering Co. 

GRASS VALLEY, CALIFORNIA 




Yellow Strand Stands the Strain 



The real proof of Yellow Strand's flex- 
ibility is its remarkable durability. 

You can bend a piece of wire back and 
forth only about so many times. Then the 
resulting crystallization of the metal causes 
it to break. The more flexible the wire, 
the more bending it will stand. 

Every individual wire in a rope is bent 
time and again as it passes over the sheaves 



or drum. And in most cases the sheaves 
and drum are entirely too small. If the 
wire is not flexible enough, the rope will 
break before it has earned its cost. In some 
ropes, strength is sacrificed for flexibility. 
In others, flexibility is sacrified for strength. 

In Yellow Strand are combined extreme 
strength and the greatest flexibility it is 
possible to obtain in steel rope. 



WRITE FOR CATALOG No. K-tfi 

BRODERICK & BASCOM ROPE COMPANY 

General Offices: 805-809 North Main St. 

New York City ST. LOUIS Seattle, Wash. 

San Francisco— 72 Fremont St. New Orleans 



MINING AND SCIENTIFIC PRESS 



July 5, 1913 



DODGE 
CAPILLARY BEARINGS 

SELF LUBRICATING 



Clean and Fill 
Once or Twice 
a Year 




The Time and 
Money Saver 



Old style bearings require an "oil patrolman." This means 
an extra expense of at least $2.00 per day or $600 per year. 

Why Not Save $600 per year? 
"Dodge" Capillary Bearings Will Save It For Yon. 
In Stock— Immediate Delivery. 



Harron, Riekard & McCone 

SAN FRANCISCO LOS ANGELES 




An M & G Gravel Plant in the High Sierras. For Pacific Gas & Electric Co. 



ALONG THE PACIFIC COAST, M & G WASHING AND SCREENING 
PLANTS STAND AS MILE POSTS TO MARK THE 
MODERN WAY TO GOOD CONCRETE. 

Is there any reason why we should not figure on your next plant? 
SAN FRANCISCO SEATTLE PORTLAND VANCOUVER, B. C. H0QIIIAM LOS ANGELES 

55 Main St. 55S First Ave. S. 67 & 69 Front St. Pacific Bldg. Lamb Mach. Co. 130 No Los Angeles St. 




1 Science hju no enemy uvc the ignorant/' 



Whole No. 2764 



tOllMI 107 
M NMR ■_• 



San Francisco, July 12. 1913 



IIIHII I (US flu ISM M 

Slnflr loplra, Trn frnli 



MINING AND SCIENTIFIC PRESS 

UTABUtHBD M 1 1 - i. IMt, 

CONTROLLED BT T. A. RICKARD. 

EDITORIAL STAFF: 
San Francisco 

H. FOSTER BAIN Editor 

EUGENE H. LESLIE 1 .... M „ . 

M W. von BERNEWITZ } " " " *••'•«»"* Edlt °" 
New York 

THOMAS T. READ Associate Editor 

London 

T. A. RICKARD .... Editorial Contributor 
EDWARD WALKER .... Correspondent 

SPECIAL CONTRIBUTORS: 
A. W. Allen. Charles Janln. 

Leonard S. Austin. James F. Kemp. 

Gelasto Caetanl C. W. Purlngton. 

Courtenay De Kalb. C. F. Tolman, Jr. 

F. Lynwood Garrison. Horace V. WlnchelL 

PUBLISHED WEEKLY BY THE DEWEY PUBLISHING CO. 

AT 420 MARKET STREET. SAN FRANCISCO. 
Cable Address: Pertusola. Code: Bedford McNeill (2 editions). 

BRANCH OFFICES: 
CHICAGO — 734 Monadnock Bdg. Tel.: Harrison 1620 and 636. 
NEW YORK — 1308-10 Woolworth Bdg. Tel.: Barclay 6469. 
LONDON — The Mining Magazine. 819 Salisbury House. E. C. 
Cable Address: Ollgoclase. 

ANNUAL SUBSCRIPTION: 

United States and Mexico (3 

Canada $4 

Other Countries In Postal Union 21 Shillings or J5 

L. A. GREENE ----- Business Manager 

Entered at San Francisco Postofflce as Second-Class Matter. 



EDITORIAL 



TABLE OF CONTENTS 



EDITORIAL: Page. 

Notes 41 

Law and Mining in West Virginia 43 

Geologle of Kalgoorlie 43 

The Rand Strike 44 

ARTICLES: 

Geology of the Kalgoorlie Goldfleld — I 

Malcolm Maclaren and J. Allan Thomson 45 

Dredging at Panama 48 

The Olancho Country A. D. Akin 49 

The Mclntyre-Forcuplne Mill 52 

A Simple Plant for Testing Efficiency A. T. Tye 53 

Kleinfonteln and Tube-Mills 55 

Searles Lake Potash Deposits H. S. Gale 56 

Iron Production for 1912 58 

Gravel Plant in Nevada 58 

Relation of Faulting and Mineralization in Goldfield. 

Corrln Barnes and E. A. Byler 59 

The Basic-Lined Converter E. P. Mathewson 61 

Improvements at the Old Dominion Mine, Arizona.... 61 

Portable Electric Mine Lamps H. H. Clark 62 

The Analysis of Black Powder and Dynamite 65 

Metal Production In Arizona 78 

Australian Copper Production 78 

The San Francisco Mint 78 

Metal Output of the Central States 78 

Philippine Mineral Production 79 

Mineral Production of Peru in 1911 79 

Ore Reserves of Rand Mines 79 

High-Voltage Direct-Current Locomotives 83 

DISCUSSION: 

The Psychology of Zinc F. L. Clerc C3 

Oil-Burning in Furnaces Herbert Lang 64 

The Mother Lode of California W. T. Robinson 65 

SPECIAL CORRESPONDENCE 66 

GENERAL MINING NEWS 71 

DEPARTMENTS : 

Personal 75 

Schools and Societies 75 

Metal Markets 76 

Stock Markets 77 

Company Reports 80 

Rook Reviews 81 

Recent Publications 81 

Concentrates 82 



A GERMAN professor with a new divining rod 
lias arrived in this country on the same steamer 
with a scientist who has a light that duplicates 
daylight. We second the suggestion of the New 
York Sun that they get together and hunt turtles 
for the Friedinann Institute. 



"VTO.ME citizens are reported to have held a mass- 
meeting to protest against the new mining law 
passed by the territorial legislature and to appeal 
to Congress for its revision ; rather a sorry com- 
ment on the vociferous demand for home rule that 
has been coming from Alaska. 



"D EPORTS from Antwerp state that the control 
of the Trinidad Oilfields, Ltd., has passed to 
the Royal Dutch-Shell company, unusual interest 
being lent to the transaction by the statement that 
the purchase was made jointly with the British 
Western Isles, Ltd., a Rothschild company. The co- 
operation of two such large interests in the Trin- 
idad fields is strong evidence of their great probable 
value. 



TTAVING two trains pass on the same track has 
been frequently, if inadvertently, tried, but the 
experiment has been wholly without success. At 
the Rosas mine in Sardinia, Mr. E. Praetorius has 
found how to make two buckets on an aerial tram 
pass on the same rope ; and as usual, it is simple 
when you know how. This ingenious piece of en- 
gineering is described and pictured in the June 
number of our London contemporary, The Mining 
Magazine. 

SHIPMENT of an initial consignment of East 
Texas brown iron ores from Galveston to Phila- 
delphia has been made as part of a contract to sup- 
ply 300 tons per day. The outcome of the venture 
will be a matter of interest to the West generally. 
The brown ores of Texas, while low in phosphorus, 
are also rather low in iron, and shipments on a 
large scale can scarcely be expected to maintain 
a grade of over 32 to 35 per cent. Freight rates 
to the ore fields are heavy, and there seems to be 
a better opportunity for the development of iron 
smelting within Texas. There is a fair market for 
pig iron in that state, and a larger market for such 
steel products as cotton ties and fence wire, while 
the demand is brisk for the ammonium sulphate that 
is a by-product of coke-making. Plans are well ad- 
vanced for the beginning of smelting in Texas, and 
it is to be hoped that iron-making may take its 
way westward in company "with 'the star of em- 
pire. ' 



42 



MINING AND SCIENTIFIC PRESS 



July 12. 1913 



"POISONING from an unusual cause is reported 
by Dr. Louis Casamajor in a recent number of 
the Journal of the American Medical Association. 
The men affected worked in the mill of a large mine, 
of which zinc was the chief product, and after 
periods of from six months to three years developed 
a pathological condition of the central nervous 
system, affecting principally the mechanism of walk- 
ing and equilibrium. The ore was practically free 
from lead and arsenic, but contained quantities of 
manganese, to which Dr. Casamajor is inclined to 
attribute the effect produced. At the risk of seem- 
ing to treat a serious subject with undue levity, we 
venture to suggest that a similar effect is exhibited 
within a shorter period following the ingestion of 
spiritus frumeuti, 

O L"( .'liESTIONS for a scientific non-partisan tariff 
*^ commission are met regularly at Washington 
by the statement that the members of Congress 
concerned in the revision, themselves constitute a 
commission directly chosen for the task in hand. 
An excellent side-light on their competence is thrown 
by the testimony of Mr. A. B. Fall, senator from 
New Mexico, to the effect that there is a 'zinc trust' 
and that it controls most of the zinc deposits and 
smelters of this country. In fact, the most impor- 
tant sources of zinc ores in the United States are 
the Joplin, Leadville, and Wisconsin districts, and 
no company controls any one of these. The most 
important use of spelter is for galvanizing, and 
probably the largest user is the United States Steel 
Corporation, which controls the Edgar Zinc Com- 
pany, which, however, operates less than 10 per cent 
of the retorts in this country. The New Jersey Zinc 
Company is the largest single concern and does 
dominate the zinc oxide business. In the mining 
of ore, however, or the making of spelter it plays 
only a minor part. The zinc business is particularly 
free from control, and it is a pity that matters so 
important as the tariff should be decided by those 
who are so ignorant. 

JULY brings dog days (elsewhere than in Cali- 
" fornia) and also dividend disbursements. Ac- 
cording to the computations of the leading finan- 
cial journals, over $266,000,000 in dividends and in- 
terest on railroad and industrial securities was paid 
on July 1. This represents an increase of $12,000,- 
000 over July 1, 1912. Rut what is more encourag- 
ing is the decrease in new securities issued. Rail- 
roads have placed $152,000,000 less of new securities 
in the first half of this year than they did in the 
corresponding period of 1912. while industrial cor- 
porations have issued $227,000,000 less. This short- 
ening of sale is most encouraging for the country 
at large, but leads to dull fimes in Wall Street. It 
is related that the junior partner of a firm of brok- 
ers that formerly did a large business was recently 
observed leisurely taking a hearty lunch. To the 
question as to how he could afford to remain away 
from his office for so long a time, he replied, "Our 
customer is sick." Preparations to finance the mov- 
ing of crops next fall. are already under way, and 
call money in New York during June commanded 
2.291 per cent, or over %y« per cent less than well 



secured time loans, an unusually large margin, an I 
one that should result in a good supply of ready 
money in the autumn. 



/CONDITION'S in Mexico appear to be growing 
^ steadily worse regardless of the efforts which 
the preset administration has made to stem the tide 
of. revolution and brigandage which has swept the 
country from the Rio Grande to Guatemala. The 
latest reports from Mexico state that the Huerta 
government is bankrupt and on the verge of col- 
lapse ; Felix Diaz, the instigator of the revolution 
which resulted in the overthrow of the Madera 
regime, and who has been generally accepted as the 
next president, has sailed for Europe : President 
Huerta is anxious to be relieved of the presidency ; 
and Francisco de la Barra. Mexico's foremost diplo- 
mat, who will be remembered as the representative 
cf Porfirio Diaz at Washington and who succeeded 
him as president, has resigned as Minister of Foreign 
Affairs. So it would appear evident that the present 
administration is facing a more serious situation 
at the present than at any time since taking up 
the reins of government. With the revolution gain- 
ing ground and the apparent inability of the federal 
troops to cope with it, a lack of funds and an ever 
changing personnel of the government officials, it 
would seem that there is no hope within Mexico 
for her salvation. However, to those who have 
tried and are trying to keep the mines and mills 
going in spite of the many handicaps and dis- 
couragements, while there is apparently no im- 
mediate solution, it is a long road that has no 
turning, and it is to be hoped that the pendulum 
will soon swing in the opposite direction. 



"CiLSEWHERE in this issue, Mr. Herbert Lang 
T~ discusses the conditions governing the combus- 
tion of liquid fuel. An atomized liquid, which 
superficially resembles a gas, differs essentially 'from 
a true gas, and even more markedly from a solid 
combustible, in its method of burning. In the ease 
of a gas, it is easily seen that proper care must be 
taken to secure its thorough mixing with a suffi- 
cient quantity of air in order to provide the oxy- 
gen necessary for the heat-liberating reaction, avoid- 
ing any undue excess, since air consists largely of 
nitrogen, which carries away heat without having 
been productive of any. In the ease of solid fuel, 
this almost adjusts itself in any reasonably well 
designed furnace, since the fuel and air move in 
contrary directions, the fuel burning away as fast 
as air is supplied for the purpose. In an oil-fired 
furnace the fuel and air move in the same direction 
at nearly equal speed, cross-currents providing for 
the proper mixing. Careful regulation is necessary 
to constantly maintain the proper proportion of air 
and liquid. In addition, the minimum temperature 
of combustion must be maintained as well. A hot 
coal will continue to burn, though in contact with 
a cold surface, if supplied with air for combustion, 
because the coal keeps itself hot enough by the heat 
it liberates. A gas-air mixture, or an air-liquid 
mixture, will not continue to burn under such cir- 
cumstances, because it radiates heat so rapidly that 



July r_\ n>u 



MINING AND SCIENTIFIC PRESS 



it quickly cools itvll In-low tin- minimum coiuhus 
tion temperature. Tbc solid furl burns on ita grate 
.iii-l radiate* its brat to uearby objects; a gas or 
liquid burns throughout the combustion space, ami, 
if allowed to radiate its beat too quickly, soon cools 
below- the temperature of combustion. Hence it fol- 
lows that the proper mechanical construction of a 
firebox or furnace for burning liquids differs mark- 
edly from that which gives the most satisfactory 
results with solid fuel. 



C 1 ! KTI1K1J details are now available concerning 
A the huge metallurgical plant to be erected tn 
treat copper ore by leaching at Chuquicamata, as 
discussed at some length in our editorial columns 
of June 21. The ore, which is mined by steam- 
shovels, will be subjected to a preliminary crushing 
in gyratories, crushers, and rolls, and then distrib- 
uted, by a system of belts, into concrete vats, lined 
with acid-proof materials and holding 9000 tons 
each. It is estimated that one day will suffice for 
filling a vat, two to three days for acid treatment, 
and washing, and one day for discharging, each vat 
holding one day's ore supply. The extraction proc- 
ess might perhaps be more accurately termed soak- 
ing, rather than leaching, since it is not necessary 
to cause the solvent to percolate through the on 1 
to the same degree as is required in eyaniding gold 
ores. The pregnant solution will be drawn off into 
solution tanks, preliminary to electrical precipita- 
tion. The leached residue will be excavated from 
the vats by clam-shell buckets operated from a trav- 
eling bridge, somewhat resembling the system used 
in reloading coal from stockpiles, and the residue 
will be piled upon the waste dump by a series of 
belt conveyors. The plant is to be built upon a 
side-hill having a 6° slope and of sufficient extent 
to provide ample storage room for the great quan- 
tity of tailing which will in time be produced. The 
contract for the construction of the electrical power- 
plant and transmission line has already been let to 
the lowest bidder, a German firm, for approximately 
$3,000,000; the equipment including a 40,000-kilo- 
watt. oil-fired power-plant on the seacoast, a 100- 
mile transmission line to the mines, and the neces- 
sary auxiliary sub-stations and transformers. It is 
hoped to have the plant in full operation within 
three years, but construction work on so large a 
scale at so great a distance from headquarters may 
easily involve unexpected delays. 

Law and Mining In West Virginia 

We have so far refrained from comment on the 
coal-mining situation in West Virginia, for much 
the same reason that an onlooker might well hesi- 
tate to assess the blame in the progress of a Donny- 
brook fair. We can, however, agree heartily with 
Sir. Theodore Roosevelt in putting the blame square- 
ly up to the courts for the part they have played 
in a situation which in no phase evokes admiration. 
On the one hand, it has been charged that armed 
attacks upon labor camps were made by men who 
were presumably agents of the operators, that the 
declaring of martial law was unjustified, and "the 
employing operators have not only discriminated 



in Utterly unjust and auti-ioeial fashion against 
labor unions, but have rndravorrd to keep the min- 
ers in n state of practical serfage by the use of 
company stores." On the other hand, it is alleged 
that demoralization of the profitable mining indus- 
try of West Virginia was incited by operators in 
other districts, who found a ready tool in labor 
leaders anxious to reap personal profit through stir- 
ring up trouble. Of the measure of truth in these 
counter allegations we profess no special knowledge. 
Hut it must be evident to any sober thinker that 
the courts of West Virginia, in declaring unconsti- 
tutional all the legislative measures intended to pre- 
vent the exploitation of employees through the aid 
of the company store and, on the other hand, in re- 
fusing to permit that degree of combination among 
operators which would preserve them from cut- 
throat competition, is in large degree to blame for 
a condition which is almost synonymous with an- 
archy. It is truly remarkable that the courts, sup- 
posed to be the guardians of the rights of the peo- 
ple, have developed into institutions of slow-witted 
legalism which seem to be chiefly effective in ob- 
structing the securing of the rights of labor and 
capital alike. That anarchy which is misnamed so- 
cialism by such organizations as the Industrial 
Workers of the World finds its chief justification in 
the manner in which the courts defeat the will of 
the people in attempting to adjust themselves to 
the ever-changing conditions of that social organ- 
ism which we call the American nation. Cannot 
some effective means be devised to convey to the 
legal mind the fact that we are now living in the 
twentieth century? 

Geology of Kalgoorlie 



Kalgoorlie is one of the world's great goldfields, 
and to engineers it is of wide interest, not alone be- 
cause of the production, notable as that is, but be- 
cause of the occurrence of the ore, the presence of 
tellurides, and the marked advances that have been 
made in mining and metallurgy in the field. A de- 
tailed study of the mode of occurrence of the ore 
is well worth while. We are glad, therefore, to print 
this week the first of a series of articles written 
by Mr. Malcolm Maclaren, and describing the geol- 
ogy. The articles are taken by permission from an 
unpublished report upon the field made for three of 
the leading companies. They cover the main part 
in its scientific phases, except a most interesting 
chapter on petrology more appropriate for publica- 
tion elsewhere. The parts of the report dealing spe- 
cifically with the ore deposits, being the private 
property of the companies, cannot be printed at this 
time, but in the material now so generously made 
public, enough is given to enable the trained student 
of ore deposits to recognize the essential steps in 
the deposition of the ore. Those not already famil- 
iar with the district should read in this connection 
the admirable account of the ore deposits prepared 
by Mr. C. O. G. Larcombe, and forming volume V 
of the Proceedings of the Australian Institute of Min- 
ing Engineers. While the nomenclature of the rocks 
differs in the two reports, in which particular they 
run true to form for geological reports on the pre- 



II 



MINING AND SCIENTIFIC PRESS 



July 12. 1913 



Cambrian, the general sequence is the same. 

Except the quartz veins, here of minor import, 
and the alluvial deposits, which are aside from the 
general discussion, the ore occurs at Ealgoorlie in 
two forms: The first is the wonderful Oroya Brown- 
hill 'pipe', a great body of ore outcropping in Brown- 
hill ground and dipping through the Brownhill Ex- 
tended, Associated Northern, and Oroya. It is found 
in what Mr. Maclaren calls the 'Older Greenstone' 
near the contact of the latter with his 'quartz- 
dolerite'. For these rocks Mr. Larcombe uses the 
terms 'metamorphic tuff' and ' quartz-andesite ', re- 
spectively. This orebody was formed by replace- 
ment in a position determined by intersecting fault 
planes. The bulk of the orebodies, however, occur 
in the quartz-dolerite (or quartz-andesite) along 
fissures or 'shear zones.' In this they resemble the 
veins at Cripple Creek. These fissures are only sig- 
nificant and only contain valuable orebodies when 
in the quartz-dolerite ; presumably because it was 
the only rock that was sufficiently brittle to break 
in long fissures, thereby forming what Mr. C. K. Van 
Hise has called 'trunk channels' for underground 
circulation. Both Mr. Larcombe and Mr. Maclaren 
agree as to the ores being primary and intimately 
related to the quartz-dolerite. Mr. Larcombe sees 
no reason why the ore-shoots should not continue 
indefinitely in depth. Mr. Maclaren says that the 
value of a given lease is conditioned by the extent 
to which it covers the quartz-dolerite ; plainly indi- 
cating a belief that the veins will be found of no 
value where they pass outside this especial rock. It 
is perhaps unfair to speculate more closely as to 
what Mr. Maclaren does or does not believe about 
the genesis and structural features of these ores, 
since the time is not ripe for full exposition of his 
views. That they are well founded will be certain 
to everyone who reads the part of the report now 
made public. 

It remains but to express here appreciation 
of the far sightedness of Mr. H. C. Hoover, who 
projected the work, and the liberality and broad- 
mindedness of Messrs. Bewick, Moreing & Co., who. 
charged with the management of the companies con- 
cerned, saw the value in and supported the making 
of a geological survey of the district as complete 
and as scientific as any conducted elsewhere at gov- 
ernment expense. Science has no enemy save the 
ignorant, and the miner has no such helper as 
science. It is a pleasure to print in a mining journal 
a scientific report made by a distinguished geologist 
for a firm of engineers managing a group of mines 
of first magnitude. 

The Rand Strike 

Not since the days of the Jameson raid and the 
war of 1898 has Johannesburg been the scene 
of as much turmoil as has recently been experienced 
in that city as a result of the strike of the Rand 
miners. At the New Kleinfontein a dispute over 
working hours led to a strike, which was settled 
by the management granting the requests of the 
men. The next demand was for the dismissal of 
those strike-breakers who refused to join the union. 
The management was obdurate and the workmen 



of mine after mine struck in sympathy with the 
New Kleinfontein men, the strike even spreading 
to the coal mines, and the railway employees threat- 
ened to go out. Only the presence of troops main- 
tained electric-power service. After several days 
of riotiiuz. in which over a hundred lives were sac- 
rificed in addition to .property being damaged and 
the losses due to the closing of the mines, a settle- 
ment of the difficulties was reached by a committee 
appointed by the Government and a committee of 
the strikers. The terms of settlement were that the 
strike should be declared off; the New Kleinfontein 
strikers are to be reinstated, and the Government 
is to grant suitable compensation to the strike- 
breakers, who are in no way to be victimized; the 
strikers in other mines are to return to their work 
and are to be taken back as mining operations are 
resumed : representatives of the workers are at lib- 
erty to lay any other grievances before the Govern- 
ment, which will inquire into them. While the strike 
is regarded by the miners as a victory for organ- 
ized labor, are the terms of settlement commensurate 
with the loss of life and property which has been 
occasioned, and could not the same results have been 
accomplished by more peaceful means? Like the 
disarmament of the nations and the much-talked-of 
universal peace, it seems to be a matter of theory 
rather than of practice, but it is to be hoped that 
by a closer relation and a better understanding be- 
tween employer and employee, such catastrophes 
as the present one may be avoided and the questions 
iu dispute decided by arbritation, which is always 
the ultimate result, regardless of how much blood 
has beeu shed previous to the settlement. 

While most of the strikers have returned to work, 
the peace terms have not been generally accepted. 
Six thousand native black laborers from three of 
the large gold mines have refused to go into the 
mines unless granted an increase in wages, and a 
thousand in another property are reported to have 
broken out of their compound and were only made 
to return when forced to by the troops. Should 
this attitude of the native labor spread to the other 
250,000, which arc employed in the district, the re- 
sult might be disastrous. 

The Government has recently ordered a cessation 
of recruiting native laborers in the district north 
of 22° south latitude, which will eventually cause 
the mines to lose 25,000 native laborers, and this 
fact has accentuated the difficulties experienced in 
handling the white workmen. Not a few observers 
consider that the gold production on the Band has 
already reached its zenith, and if to the increasing 
operating costs and a decreasing return per ton 
milled are to be added the heavy burdens resulting 
from the exactions of labor unions, the repaid de- 
cline of the gold-mining industry on the Rand is 
not far in the future. The present outbreak must 
seem peculiarly ungrateful to Mr. R. W. Schumacher, 
of the Rand Mines, and the Central Mining & In- 
vestment Corporation, Ltd., who has been espe- 
cially active in securing for miners the opportunity 
to purchase homes on the easiest possible terms 
and also in securing them more favorable terais for 
contract work. 



J»b 1- 1913 MINING AND SCIENTIFIC PRESS 

Geology of the Kalgoorlie Goldfield— I 



By Mamih m Mailauks and J. Allan Thomson 



The geological tuul otlwr iliitn contained in the 
following pages form a portion of the results of a 
geological survey of the Kalgoorlie goldfield in 
Western Australia, extending from April 1909 t» 
March 1910. The initiation of the survey is to be 
ascribed to EL C. Hoover, whose knowledge of the 
field had indicated the probable utility of a close 
geological examination. It was at first hoped that 
the leading companies of Kalgoorlie and perhaps the 



WESTEBX AUSTRALIA. 

Government of Western Australia would unite in 
sharing the cost of the survey. Finally, however, it 
was borne by the Ivanhoe Gold Corporation, Ltd., 
the Oroya Brownhill Co., the Lake View Consols Co., 
and in a certain sense by the authors. The burden 
of the work fell on the senior author. The petrologic 
work was largely left in the hands of the junior 
author, who also was responsible for much of the 
mapping of the northern end of the Kalgoorlie 
auriferous area. 

Situation and Topography 

The Kalgoorlie goldfield lies on the great inland 
plateau of Western Australia. The western boun- 
dary of this plateau is the sharply defined fault 
escarpment lying parallel to and only a few miles 
from the coast at Perth. Its main southern boundary 
is apparently the fault line that forms for so great 
a distance the shore of the great Australian Bight. 
To the east the plateau probably reaches to the South 



Australian border, the surface then sinking to the 
Central Australian depression. Its northward ex- 
tension is somewhat indefinite, but it passes at least 
beyond the Pilbara goldfield*. In the immediate 
neighborhood of Kalgoorlie the average height of 
the plateau above sea-level is some 1250 ft., while 
the maximum height is reached at Mt. Burges (1922 
ft.), nine miles north Coolgardie. No figures are 
available for the majority of the lake-beds, but that 
of Hannan's lake, 1060 ft. above sea-level, may be 
assumed to represent the average level of these. The 
physiographieal feature of the region is thus its low 
Telief, Mt. Burges, Mt. Robinson, Mt. Hunt, Mt. 
Monger, and others, being merely semi-isolated 
mounds or the higher portion of short ridges, in a 
gently undulating plain. 

Physiographieal Features 

In a region of long-continued erosion, physio- 
graphieal features become inevitably the expression 
of the geological structure, and here is no exception 
to the general rule. The ridges are generally the 
harder greenstones, though at Kanowna, quartz-por- 
phyry, and at Kurrawang, coarse conglomerate rise 
to ridges. The valleys and lower land generally is 
occupied by sedimentary rocks or by porphyrite. 
which decomposes just as readily and to a very 
.similar product. The general aspect of the region is 
one of broad shallow valleys with low comparatively 
narrow ridges. To the south of Coolgardie as far 
as the Londonderry, in the contact-metamorphosed 
amphibolite, ridges and valleys are narrower and 
the surface assumes a comparatively rugged char- 
acter. On the whole, the general trend of the ridges 
is north-northwest with the strike of the rocks, but 
low watersheds trending east-west have been occas- 
ionally developed, as between Coolgardie and Kal- 
goorlie, by the ancient drainage system of the area. 

The mines of Kalgoorlie itself are disposed along 
a low ridge some five and one-half miles in length, 
of which, however, only the southern portion has 
been as yet highly productive. This is 'The Mile' of 
the inhabitants and 'The Golden Mile' of journalists 
and company promoters. Th» ridge strikes with the 
foliation of the country north-northwest and south- 
southeast, and is flanked on either side by a broad 
shallow valley. Its average height is only 100 ft. 
above that of the valley bottoms. Its highest point 
is Mt. Charlotte (1378 ft.), which has been utilized 
as the site of the reservoir from whence the water 
brought from the Darling ranges, near the coast, is 
distributed. The lowest point in the immediate 
neighborhood is, as already mentioned, the bed of 
Hannan's lake (1060 ft), some two and one-half 
miles south of the principal mines. The total differ- 
ence in level is therefore only 320 ft., and the most 
striking features in the Kalgoorlie landscape are in- 
deed not natural, but are the great tailing dumps of 
the various mines. The valleys of the region occupy 
the lines of an ancient drainage system, now largely 




MINING AND SCIENTIFIC PRESS 



July 12, 19U 



filled and buried by wind-driven sand and debris. 
They contain no defined watercourses or thalwegs. 

History of the Kalgoorlie Goldfield 

The discovery of gold at Kalgoorlie may be re- 
garded as an indirect result of the impetus given 
to prospecting in Western Australia by the finding 
of gold at Kimberley in 1886, and at Yilgarn 
(Southern Cross) a year later. Western Australia 
had previously been considered a country barren in 
gold, an illusion shaken by these discoveries and 
completely shattered by later reports, in rapid suc- 
cession, of gold from the Pilbara. Ashburton, and 
Murchison. Finds so widespread and so rich as some 
of these were, naturally attracted the attention of 
the vagrant prospectors of the eastern states, who 
searching for new fields, soon arrived in the colony, 
and pushing beyond the outposts of civilization, 
spread eastward with horses and camels into the dry 
and poorly watered inland plains. Previously tha 
country had been known only to explorers, of whom 
the principal were Lefroy (1S63), Hunt (1864). For- 
rest (1871). -Giles (1875), and Lindsay 1891). Their 
attention was directed rather to the pastoral than 
to the mineral resources of the country. Hunt, in 
particular, with a large wagon train, had discovered 
and occupied the areas now held by the Hampton 
Plains Co. in the vicinity of the goldfields. His ob- 
ject was solely the acquisition of pastoral lands; to 
this end he selected the valleys and carefully avoided 
the poorer stony ridges on which Coolgardie and 
Kalgoorlie are situated. By so liftle, in view of the 
immense area taken up. was fortune missed. 

Hunt spent some time in the country digging wells 
and tanks to fit the areas selected for occupation by 
cattle, and had had more opportunity than other 
explorers for examination of the rocks. He noted 
numerous quartz outcrops, and it was perhaps the 
rumor of these that determined several prospectors 
to examine the country lying east of Southern Cross. 
Favored with good rains, two, Bayley and Ford, 
pushed eastward in June 1892, across the great gran- 
ite belt, following the track of Hunt's wagon wheels, 
not wholly obliterated after 28 years of desert dust 
and storm. They rested at the Gnarlbine 'soak,' and 
then moved northeast to a 'gnamma' hole, known 
to the aboriginals as Gulgurda, afterward to be soft- 
ened by the digger to Coolgardie. Camping on what 
is now known as Fly Flat, they soon detected gold 
lying on the surface, Ford picking up a slug weigh- 
ing half an ounce. 

Alluvial Gold 

Western Australia is one of the few auriferous 
areas in the world in which direct support is given 
to the vulgar belief that gold nuggets lie on the sur- 
face for the picking up. After rains and before the 
winds have had time to obscure the washed surface 
with the light desert dust, grains and nuggets of 
gold are readily seen by the trained eye, a method 
of search known as 'specking.' Three or four weeks 
dry-blowing and specking had yielded to Ford and 
Bayley 200 oz. of gold, when they we're forced to re- 
turn to Southern Cross to replenish their supply of 
provisions. With the digger, shallow alluvial gold 
is merely the promise of great stores of vein gold. 



and the two prospectors on their return lost no time 
in examining the adjacent quartz outcrops. They 
were more fortunate than the majority of pros- 
pectors who have acted on this assumption, for a 
short search disclosed the cap of a rich gold-quartz 
vein, from which they had by the end of the day 
and withihe aid of a hatchet and pestle and mortar 
obtained more than 500 oz. of gold. They had al- 
lowed no inkling of their first discovery to escape, 
and it was not until the application for a reward 
claim was safely lodged, on September 17. 1892, with 
the warden at Southern Cross that the news of the 
great value of the discovery and of its locality was 
made public. 

A steady inrush to the new Eldorado naturally 
took place, but its magnitude was at first limited by 
the difficulty of transport, by the high cost of pro- 
visions, and most of all, by the great scarcity of fresh 
water. When all available auriferous ground had 
been taken up at Coolgardie, prospectors spread out 
from that centre scouring the country for many mill's 
in search of new fields. When the discovery was re- 
ported, a wild scramble took place to peg out in the 
neighborhood of the original reward claim. In 
these 'rushes' every available means of transport 
was pressed into service, camels, horses, bicycles, 
carts, and even wheelbarrows being mingled with 
the throng that pressed forward on foot and carried 
their supplies on their backs. Most ended in disap- 
pointment, one or two in disaster. Kalgoorlie was 
discovered in 1893 and Londonderry. Black Flag. 
Kanowna (White Feather), and Bulong (I. 0. U.) 
in 1894. By the end of 1895 more than 10.000 people 
were collected in the various camps. 

Gold Discovery at Kalgoorlie 

Gold was discovered at Kalgoorlie on Saturday. 
June 17. 1893. The finders were Patrick Hannan. 
Thomas Flannagan, and Dan Shea, who were on 
their way from Coolgardie in response to a nebulous 
rumor of rich gold at Mt. Yule (perhaps Mt. Jewel, 
northwest of Kurnalpi>. It proved an ignis faius 
in the end, and the three had camped for the 
night on the western side of a ridge 22 miles east- 
northeast of Coolgardie, near the site of the present 
Hannan street railway station. The first-named seized 
the opportunity afforded by the halt to search for 
gold in the neighborhood of the camp and soon dis- 
covered ('specked' in local parlance) gold lying in 
small nuggets on the surface. All thought of the 
district of Mt. Yule was abandoned, and Hannan 
hastily returned to Coolgardie to secure a 'reward' 
claim. The following day. Sunday. June 18. the 
whole available population flocked to the new El- 
dorado of ' Hannan 's Patch.' as it was then called. 
The so-called 'alluvial' ground west and southwest 
of Cassidy hill and Maritana hill (Mt. Gledden) 
proved very rich for a time, and occasional large 
nuggets were obtained, none, however, weighing 
more than 24 oz. These are. of conrse. small in 
comparison with the famous nuggets of Victoria and 
New South Wales, but the climatic conditions obtain- 
ing in the interior of Western Australia preclude the 
accretion of gold necessary for the growth on a large 
scale of alluvial gold. Other 'dry-blowing' areas 



July 1913 



MINING AND SCIENTIFIC PRESS 



17 



were soon discovered, the principal being in the 
neighborhood of Slug hill to the south of the present 
Boulder mines. So-called 'deep-leads' were also 
found both cast and west of the main ridge, but the 
yield of surface gold was never important. 

Lode Mining 

The lack of alluvial gold turned the attention of 
the diggers toward the possibility of discovering the 
lodes from which the surface gold was assumed to 
have been derived, and claims were pegged out in 
all directions, but mainly north and south along the 
Kalgoorlie ridge. Most of the miners on the new 
field had gained their experience in Victoria, New 
South Wales, Queensland, and New Zealand; it was 
therefore natural that the search for vein gold should 
be confined to quartz outcroppings. These had fur- 
nished the gold of the neighboring Coolgardie field 
and there was nothing to indicate that different con- 
ditions obtained at Kalgoorlie. It thus happened that 
the rich mines of the Boulder belt, two miles south 
of the original discovery, were pegged out on ac- 
count of their worthless quartz veins. Capital from 
Adelaide and Melbourne was furnished to open up 
most of these mines, but development was for a long 
time exceedingly slow. It was known even then 
that the rich deposits of the outcrops of the ma- 
jority of "Western Australian lodes did not persist 
below the zone of oxidation ; it was therefore feared 
that Kalgoorlie lodes would form no exception to 
the general rule and there was, from market consid- 
erations, a rooted disinclination to pass into the sul- 
phide zone lying at an average depth of 180 ft. be- 
neath the surface. The Great Boulder mine led the 
way into this zone, and. its success encouraged others 
to follow. 

The first real hope for the permanence of the field 
was, however, engendered by the discovery of tellu- 
rides of gold. An event of such importance warrants 
some description in detail, the more so as after the 
lapse of only 14 years there is now a conflict of 
opinion not only regarding the events that led up 
to the discovery, but even with regard to the iden- 
tity of the discoverers. "With some trouble the fol- 
lowing sequence has been pieced together. 

The First Tellurides 

The scene of the discovery was the Block 45 mine, 
now included in the ground of the Oroya Links. Ltd. 
The then manager, Richard Eades, had obtained rich 
assays from samples that showed little or no free 
gold. Repeated tests had proved that the gold was 
associated with or contained in a soft pale bronze 
mineral, and samples were therefore sent both to 
Kalgoorlie and to Coolgardie assayers. Eades in- 
dicated the mineral canning the gold and asked for 
a determination of its nature. The assayers tenta- 
tively suggested one of the iron sulphides, but the 
extreme softness of the unknown mineral at once 
showed that this suggestion was incorrect. On Sun- 
day, May 24, 1896, specimens were taken by Robert 
Gibson from the Block 45 mine to his 'camp' on 
Maritana hill and were there shown to Allen David- 
son and Erie Huntley as typical of the rich 'sul- 
phides' of the mine. The last-named had had some 



experience of telluride ores st the Mt. Shamrock 
mine in the Mt. Burnett district, Queensland, where 
gold is associated with hessite (silver-gold telluride), 
tetradymite (bismuth telluride), and frcnzclite 
(bismuth selenide), and he suggested that the new 
mineral was a telluride of gold. This mineral was 
unknown to the others present and its very existence 
was indeed scouted, but the question was soon settled 
by a reference to a 'Dana' lying handy. Huntley 
tooled away fragments of the mineral and on the 
following day made blowpipe tests on them, confirm- 
ing the accuracy of his suggestion. That evening, 
in the course of conversation, he communicated the 
news of his discovery to Peter Maclntyre, then rep- 
resenting the company holding the rights to the cya- 
nide patents in Australia. 

Definite Proof of Discovery 

On Wednesday, May 27, 1896, Eades forwarded 
two samples to A. G. Holroyd, of Holroyd & Tinley. 
These, on assay, yielded respectively 31 oz. 10 dwt. 
and 92 oz. 7 dwt. gold per ton. Following his usual 
custom, Holroyd 'panned off' some of the ore and 
was immediately struck by the discrepancy between 
the high assay value of the original samples and the 
meagre quantity of free gold in the pan. The first 
sample indeed showed none, while the second gave 
only 2 oz. 7 dwt. per ton of ore. The concentrate 
obviously contained nearly all the gold. As in most 
new mining camps, there was then a considerable 
interchange of ideas among members of the same 
profession at Kalgoorlie, and Holroyd showed sam- 
ples of the ore and of the concentrate therefrom to 
Peter Maclntyre, who informed Holroyd that Hunt- 
ley's tests already made had indicated telluride of 
gold. Tellurides of gold were then almost unknown 
minerals, although the great richness of the Cripple 
Creek mines in Colorado had impressed their im- 
portance on the mining world, and there was natur- 
ally some haziness concerning the nature of the 
tests for them. Maclntyre therefore lent 'Fresenius' 
to Holroyd and shared in the tests. The existence 
of telluride of gold was soon proved by blowpipe and 
wet tests. On Friday, May 29, Holroyd communi- 
cated the news of the discovery to the press, prob- 
ably to the Coolgardie Miner, for the first reference 
to the matter in the Kalgoorlie Miner is in the issue 
of June 1, where also it is stated that the priority of 
discovery was claimed by Mr. Hunter. Meanwhile 
Erie Huntley and A. J. McGeorge had been making 
further investigations and on June 2 they published 
the first complete analysis of a Kalgoorlie telluride 
of gold : gold, 42.6 ; tellurium, 54.1 ; silver, 0.7 ; iron, 
0.9; arsenic, 1.1; sulplmr, 0.4; total, 99.8. The iron, 
arsenic, and sulphur were obviously due to a frag- 
ment of mispickel that had not been separated from 
the calaverite. 

Before the publication of the discovery Huntley 
and Maclntyre had discussed it in all its bearings, 
and naturally saw in it the solution of the problem 
that for three years had puzzled mining men at Kal- 
goorlie, the source of the rich deposits of 'mustard' 
gold and 'sponge' gold that were so characteristic 
of the. oxidized zone of the Boulder mines. 

On June 1 the Block 45 mine was thronged with 



48 



MINING AND SCIENTIFIC PRESS 



July 12, 1913 



assayers and others in quest of specimens of the new- 
mineral, and a vigorous search for it was commenced 
at other mines. On June 4, J. Collet Moulden ob- 
tained at the Croesus mine assays of 13 oz. 15 dwt. 
gold from telluride ore that had been lying on the 
dump for months. A few days later Holroyd found 
rich telluride ore at the Australia mine (Associated 
Gold Mines), where it had been found in the shaft 
at a depth of 90 ft., but, having been mistaken for 
pyrite, had been thrown over the dump. Blocks of 
ore assaying more than 500 oz. per ton had been used 
as a fireplace in a miner's hut. Within a few months 
gold tellurides had been found at the Great Boulder, 
Hannan's Star, Lake View Consols, Golden Horse- 
Shoe, and Kalgurli mines. The Ivanhoe, South Kal- 
gurli, Brownhill, and Oroya were the last of the im- 
portant mines to find the ore. 

On November 13, 1896, more than six months after 
the original discovery, gold telluride was obtained at 
a depth of 140 ft. in the Great Boulder Main Reef 
mine, then under the management of Modest Mari- 
janski, a German mining engineer, who has, strange- 
ly enough, been hailed by the German press as the 
discoverer of telluride of gold in Kalgoorlie. 
Throughout these notices there sounds a note of 
self congratulation that by virtue of his thorough 
German training this engineer had made a discovery 
that had escaped the notice of his British colleagues, 
and also that the discovery had been made at a most 
auspicious moment, just in time to prevent the con- 
templated withdrawal of English capital from the 
West Australian raining industry !* 

Later History 

A very serious hindrance to progress in the earlier 
days of Kalgoorlie was the lack of fresh water both 
for domestic consumption and for mining and metal- 
lurgical purposes. The prompt assistance afforded 
by the West Australian Government in building a 
railway to Kalgoorlie and more particularly in fur- 
nishing an abundant supply of fresh water from a 
source near the coast and 350 miles away went far 
to remove the most insistent discomforts naturally 
attendant on life in the midst of an arid desert, and 
more important still from a mining point of view, 
materially reduced working costs. The history of 
the field has, on the whole, been one of continued 
prosperity, mitigated during the past few years by 
the exhaustion of the rich, easily accessible oxidized 
ores and by the restrictions in working the lower 
grade sulphide ore brought about by lack of cheap 
fuel and water, by distance from the seaboard, and 
by the high wages and the correspondingly high 
costs both of mine supplies and of living entailed by 
the current Australian canons of political economy. 

In technical practice the principal difficulties en- 
countered at Kalgoorlie have arisen from the re- 
fractory nature of the ore, necessitating an enormous 
amount of experimental work with correspondingly 
large expenditure on new mill plants, as the older 

'Bergingenieur Modest Marijanski in Great Boulder Main 
Reef bci Kalgoorlie eine Entdeckung gemacht, die fiir 
Bergwerksindustrie der australischen Kolonie von der 
grbssien Bedeutung ist . . . Der Entdecker, von dessen 
Namen augenblicklich, alle australischen Zeitungen vollsind, 
hat ..." Zeitschrift fiir praktische Oeologie, February. 
1897, I). 72. 



methods become obsolete and uneconomical. At the 
present day both in raining and in milling methods, 
Kalgoorlie stands well in the forefront of modern 
practice. The weak feature in the former branch is 
the small size of shafts : this has not arisen from 
lack of knowledge or of foresight, but from the fact 
that there 4as never been a time when the prospects 
in depth warranted the enormous capital expendi- 
ture required for the substitution of the larger 
shafts. The greatest depth reached on the field is 
at the 2650-ft. level of the Great Boulder mine; the 
other six important mines of the belt are working 
near or below the 2000-ft. level. 

The yield of the East Coolgardie goldfield (which 
has produced little gold outside Kalgoorlie) is shown 
in the following table. The gold yield of the state 
for corresponding years is attached to indicate the 
importance of the Kalgoorlie field. 

Kalgoorlie. Western Australia. 



Year. Crude oz. Crude oz. Value. 

1893 110,891 £ 421,385 

1894 207,131 787,099 

1895 231,513 879.748 

1896 281,265 1,068,808 

1897 296,764 674,993 2,564,977 

1898 422,391 1,050,184 3,990,698 

1899 860,371 1,643,877 6,246,733 

Fine oz. Fine oz. 

1900 657,864 1,414.311 6,007,610 

1901 856,749 1,703,417 7,235,653 

1902 941,436 1.871,037 7,947,662 

1903 1,062,898 2,064,801 8,770,719 

1904 1,050,923 1,983,230 8,424,226 

1905 997,193 1,955,316 8,305,654 

1906 989,357 1,794,547 7,622,749 

1907 937,238 1,697,552 7,202,411 

1908 888,415 1,648,505 7,037,579 

1909 896,900 . 1,595,263 6,779,463 

1910 '. •850,000 1,470,626 6,212,832 

1911 809.547 1,370,861 5,823,009 

1912 788.786 1,282,651 5,463,723 

1913 (3 months).... '180,000 303,461 1,289,019 



Total fine ounces. 13,209,483 126,041,559 t£111.621,168 
•Estimated. tOfflcial. 



Dredging at Panama 

The total excavation by dredges during May was 
greater than during any previous month since the 
beginning of canal construction. The total output 
from Atlantic and Pacific entrances was 1,522,102 cu. 
yd. Of this, 957,889 cu. yd. was from the Atlantic 
entrance channel ; a large part of it, however, was 
in the removal of silt from the previously excavated 
channel. About 300,000 cu. yd. of this relatively 
light material was pumped out by the pipe-line suc- 
tion dredge No. 4, operating opposite the mouth of 
the Mindi river, in the French canal. Excavation in 
the first district of the sixth division, covering the 
Pacific entrance channel and Balboa harbor, amount- 
ed to 564,213 cu. yd., about an average output for 
the fleet. The dipper dredge Cardenas established 
a local record for rock excavation in deep water. On 
June 4 it removed 1750 cu. yd. of hard rock from 
a depth of 45 ft. below mean sea-level in 9% hours 
of actual working time. On account of the great 
depth of the channel, the dredge is able to work 
only between mean ebb tide and mean rising tide, 
which allows two watches of five hours each. 



July 12, 1913 



MINING AND SCIENTIFIC PRESS 



The Olancho Country 



By A. D. Akin 



N>> miner luis ever been down the 'Spunisli Main' 
who Ims not heard of the fabulous washings of 
the Guayape river, a stream in the mountains of 
Olaneho, one of the departments of the Republie 
of Hoiuluras. In this country, as well as the other 
little republics that make up the revolution-infested 
tail to the cornucopia of the North American con- 
tinent, placer raining can never be mentioned with- 
out some one putting in a word concerning the 
great wealth in Olaneho and the Guayape. 

So when I was asked to go to Olancho, the gen- 
tleman who wanted some quart/ reported on in that 



whs generally left to t ti . - women and children, who 
only work for a few hours on Sunday mornings. 
Yet the amount thus obtained and carried iato 
Jutiealpa in the year 1853 was valued at $129,600." 

Dr. Charles Doratt, who visited the region in the 
year 1853, wrote in private letters: "Among the 
rivers of Olaneho, which wo visited and prospected, 
the Guayape and Jalan are decidedly the richest 
in auriferous sands. We found gold in the alluvi- 
ons half a mile distant from the present bed of 
the river. Leaving Jutiealpa in a northeast direc- 
tion • • • there is not a streamlet over an area 




RIVEE SCENE IN EASTEBN HONDURAS. 



district did not know what a favor he was confer- 
ring on me. In the interim I looked into the his- 
tory of the country. To one who investigates the 
old Spanish writers, and some of the modern ones, 
it is refrshing to see how calmly they can tear the 
heart out of the truth and present you with the 
remains ; but one can be charitable and suppose that 
they were assuming to give as first handed the tales 
that some one had told them. 

Guayape Placers 

E. G. Squire, in his admirable work, the most 
valuable published in the opinion of many people, 
says: "There can, however, be but little doubt 
that the gold washings of the rivers Guayape and 
Mangualili and their tributaries are equal in value 
to those of California. The principal supplies of 
this metal in the state are from the gold washings 
of Olancho, which are exceedingly productive. The 
river Guayape has always enjoyed great celebrity 
for the amount of gold contained in its sands; but, 
since the early period of Spanish occupancy, wash- 
ing has not been carried on except on a small scale 
by the Indians, and even with them the process 



twenty leagues long and ten broad, however insig- 
nificant, which does not contain gold in its sands 
and in the banks which border it. For the most 
part e * * these streams fall into the Guayape 
and Jalan." He also names the Sulaco, Cayminto, 
and Paeaya in Yoro as good placer ground, but I 
cannot agree with him as to the Sulaco, though 1 
have had good pans at certain points on that stream. 

Early Writers 

So one might quote dozens of writers: Wells, Her- 
rera, Juarro, Montifiore, Bailey, Bryne, Lombard, 
and others, but what is the use? They all are alike. 
So I will notice but one more, and that the hon- 
orable board of Frenchmen who formed a scien- 
tific commission from their Government to these 
regions, the results of their investigations being 
published by the Honduran Government in 1897. 
Among other things, they say: "The most famous 
rivers are the Guayape and Jalan, from where the 
Spaniards, during the colonial epoch, extracted fab- 
ulous quantities of gold. The quantity of gold 
exported, won in this manner (by baiea) varies an- 
nually from 750 to 1,250,000 francs, according to 



90 



MINING AND SCIENTIFIC PRESS 



July 12, 1913 



the rainy season being more or less copious. Nug- 
gets arc frequently found weighing from one to 
seven or more ounces." 

Crammed with information in four languages, I 
went to Olancho and went up the Guayape, first 
visiting the aforesaid gold prospect. I did not see 
the maidens and little children frisk down to the 
river on Sunday morning and extract enough of 
the yellow metal to buy next week's frijoles and 
tortilla*, nor could I find that they had any par- 
ticular affection for the Guayape, but I did find 
that they went long distances from their homes to 
places on the tributaries of the river and stayed 
there for months washing gold to support them dur- 
ing the dry season. I found that the matter of 
washing was not confined to the women and child- 
ren, but is participated in by the men to the extent 
that they do their share of the excavation, the 
women doing the actual concentration and separa- 
tion. These women are wonderful in their skill 
with a great, clumsy, wooden pan, and their mus- 
cular development is almost unbelievable. 

Cost of Operation 

There is comparatively little ground on the Guay- 
ape proper that can be washed without extensive 
and costly preparation, and I am frank to say that 
T believe some parts of it are absolutely inaccessible 
within the bounds of reason in cost. The native 
washes some gravel along the Guayape, picking out 
the bars and detritus after a rain that raises the 
river to flood stage. He simply skims the top, and 
anything like deep washing is unknown to him, as 
the deepest I have ever seen them work was about 
shoulder deep. They dig holes to this depth under 
the water, scoop up as much gravel as they can, 
and pass it out to the washer on the bank. This 
manner of working is now generally abandoned for 
reasons that can readily be realized by anyone who 
has ever attempted to shovel auriferous gravel from 
under water. A great part of the Guayape, in com- 
mon with the other rivers of Olancho, is in a deep 
canon. It is probable that the bottom of this canon, 
where the gold is concentrated, is in many places 
not less than one hundred feet below the present 
river bed. Without surmising or stating the whys 
and wherefores of this conditions and others re- 
lated, I will make a quotation which sums up the 
whole condition. A. T. Bryne, late engineer to 
the Government of Honduras, under date of Novem- 
ber 15, 1888, says: "The mountain ranges show 
volcanic origin, and are generally composed of ba- 
salt, trachyte, porphyry, and granite with frequent 
limestone outcroppings. The hills and flats are for 
the most part composed of detrital matter of the 
Pliocene, or more recent origin. The hills are cov- 
ered with clay and ferruginous loam; beneath this 
cap is the detrital matter, composed of conglomer- 
ates of fine sand, gravel, quartz, greenstone, shales, 
and all the metamorphic rock of the neighboring 
mountain ranges. Local stratification is frequently 
met, but there is no evidence of continuity of its 
bedding. The depth of the detrital mass is from 
20 to 300 ft., the layers becoming coarser as the 
depth increases, the lower ones being composed of 
large boulders and gravel cemented together into 



a hard and compact mass, resting directly upon the 
bedrock. This lower layer may properly be termed 
the paystreak. The bedrock varies in the different 
portions, being either chloritie slate, garnetiferous 
mica schist, secondary granite, gneiss, diorite, por- 
phyry, and the various rocks of the Cambrian for- 
mation. Tke gold is found disseminated through 
the entire mass of these deposits." My personal 
observations accord with those of Mr. Bryne, and 
the individual supply is supplemented by the con- 
tributions of the streams that feed it. These ce- 
mented strata of detrital matter have always given 
me results sufficiently satisfactory to warrant the 
conclusion. 

It is commonly said that placering is a poor 
man's business, but no poor man would do well to 
tackle it here. With sufficient money, properly ap- 
plied, the working of these placers would be a 
tremendous enterprise and worthy of the mettle of 
any mining man. However, Olancho does not have 
to depend on its placers to be a mining country, 
for the veins bearing gold are numerous, and some 
of them are of surprising richness. Copper is abund- 
ant in places. One day an Indian brought some 
bullets whittled out of solid chalcocite. He said 
there was a vein of about four feet of the same 
metal. Crossing a little river only a couple of 
miles from the Guayape, is a vein of bitumen which 
melts and flows tinder the heat of the tropic sun. 
A short distance from this point are beds of nitre, 
and nearby native sulphur is found. Silver, of 
course, is present, and some nickel. Undoubtedly, 
careful prospecting will develop other minerals, for 
the country is an unknown land a short distance 
from the traveled roads, except in a few instances. 

Evidence of Early Workings 

Ruins of ancient civilization are common, and 
some of them are interesting. Many evidences of 
the Spanish occupation before the revolt of 1821 are 
to be found, and when one of their old mines is 
found, one generally finds something worth while, 
for in those days of crude mining methods there was 
no time wasted on low-grade. I know one mine 
that has been idle ever since the Spanish owners 
threw down their tools and fled before the advance 
of the enslaved peons, until two years ago, wheu 
the owner of the land was out hunting cattle and 
stumbled on one of the old dumps. Following this 
clue, it was found that the mine had extensive work- 
ings. For 90 years people have passed within speak- 
ing distance and the lavaderos, or gold washers, had 
a thousand times washed the sand of the little creek 
that runs at the foot of the hill, a hundred yards 
away. There are many of these old mines yet to 
be found, for there is not a village or hamlet but 
what has a store of traditions of these old mines, 
but the native is too indolent to look for what he 
does not see. The mine referred to above is one 
of the historic mines of the country and was worked 
by the Church. 

The ruins of arrastres in certain localities are 
numerous. I have found as many as six within a 
five-minute walk. Wherever these arrastres are 
found, ore good enough to work in them will gen- 
erally be found nearby. An old arrastre I know of 



July 12, 1913 



MINING AND SCIENTIFIC PRESS 



61 



luiil no visible source of on>. but several hundred 
pounds lying besiilo it gave the key, and the lode 
wa« found, accidentally, a year later and over three 
milea away, but this was an exception, for the source 
of tho ore is generally nearby. In some instances 
the arrastre was placed on the dump. I will ven- 
ture to say that if tifty per cent of the money that 
has been spent in attempting to placer on the 
(iuayape had been spent in quartz mining, the dis- 
trict would today be better known than the Klon- 
dike. 

Working Conditions 

Olaneho is a poor man's country. Everything un- 
der the sun can be grown there and at all times of 
the year. Cattle arc cheap, seven to eight dollars 
for a three or four-year-old with calf; timber is 
abundant and mainly pine, of which there are four 
varieties, including the long-leafed yellow ; the tem- 
perature averages about 70°, and, ignoring solitude, 
all conditions are ideal, except accessibility for man 
and burden. Of course, man can ride in, but even 
as he comes in on mulcback, the trip is a long and 
hard one as well as costly, but for those who un- 
dertake it properly and with sufficient capital, it 
is certain that reward lies in the hills and streams 
of Olaneho. 

The natives are, as a rule, friendly to 'gringoes, ' 
but occasionally one encounters a fanatic. I have 
found the people to be, with few exceptions, honest, 
obliging, and civil. With them the 'six-shooter' is a 
badge of gentility and station, and the telat that 
it gives secures many accommodations and civili- 
ties that I have seen denied those who sneered at 
the 'gun-packer.' I have had my gun rust until 
it stuck in the holster, and half the time did not 
know whether I had a cartridge or not. On the 
whole, the gun is a very useful part of one's kit, 
sometimes, but the American one occasionally meets 
there who is always flourishing his gun and trying 
to make an impression is an object of contempt 
to the native and pity to his better-balanced coun- 
trymen. He is the class of man who makes the 
rough places in the road for those who follow him. 

Americans as a rule have not been very successful 
in Olaneho. A notable exception is Fred Bell. With 
placer, arrastre, and buying gold from the native 
washers, he has been extremely successful, while 
working on a very modest scale. What he has done, 
others can do, for his operations have been confined 
to a zone that is not by any means the only good 
ground in Olaneho. 

Weight Standards 

Troy balances for weighing dust are not accepted 
in this country, as they only recognize the Spanish 
ounce, the subdivisions of which are represented 
by pebbles and coins. They standardize these 
weights by comparison with some that, are re- 
puted to be correct, and as these are generally 
owned by the local dealer, who makes sure that 
they do not rob him, everyone is satisfied. 

To analyze the cause for failure of Americans in 
this field would require several reams of paper. The 
key to the real cause, without individualizing, can 
be summed up in a few words : ignorance of local 



conditions, ignorance of mining, graft, and rascal- 
ity ; either, any, or all. The successful men have 
emphasized tho truth of this, and it is hard to be- 
lieve that a well balanced, competent mining man, 
speaking the language, knowing the country, people, 
and conditions, backed by reasonable capital and 
with an honest desire to do a legitimate business, 
can fail in this country of opportunities. Every 
instance of failure that has come to my notice has 
had ignorance or graft behind it as the primal 
cause. 

One man spent $20,000 on miles of ditch to bring 
an insufficient water-supply to sluice away 40 ft. 
of clay overburden, and after completing the work 
found that he not only did not have sufficient water 
to do anything, but that, also, he had no tailing 
ground. Another company spent thousands in bring- 
ing water and a fine outfit, to discover, when all 
was ready, that the entire equipment was valueless 
owing to plain physical conditions apparent to the 
most casual and non-technical observer. A dozen 
companies have gone broke because they tried to 
bring in machinery that no pack-mule in the coun- 
try could carry. They evidently knew nothing of 
the merits of sectionalized machines, and as a result 
the great pieces of iron lie rusting on the coast, 
unheeded warnings to many who have come after. 

I cannot understand the motive that leads men 
to believe that it takes less skill and experience to 
operate in these countries than at home, but it seems 
to be a popular idea. These men, predestined to 
failure, seem to have an idea that all that is nec- 
essary is to carry into the country a varied assort- 
ment of mining machinery, select a place to go to 
work, and success is certain. The results are natural, 
and they go away spreading detrimental reports in 
which they are ably abetted by the unfortunates 
who financed them. 

Natural Advantages 

The apparent mineral riches, the amenability of 
the greater part of the ores to treatment, the cheap 
water-power that exists within transmitting distance 
of most points, and a thorough understanding of 
the governing conditions prompts me in saying that 
I know of no district where there are greater pos- 
sibilities for intelligent and properly applied min- 
ing effort. It is practically untouched, for the na- 
tive, as a rule, knows the placer only and the large 
majority of foreigners have followed his lead. The 
native's placering is, of course, primitive, and the 
results he attains are commensurate. He is limited 
to what he can do with his hands and the batea. 
As an example, I might describe one outfit out of 
the many that I have seen. The party consisted 
of a man and four women. They had come forty 
miles, from Jntigalpa to the Lavaderas, there erect- 
ed huts to live in. They were removing a heavy 
overburden, carrying the pay-dirt to a water-hole 
in a ravine some 300 yd. distant, and washing it. 
They did not average over sixty cents per day to 
the person, but seemed to think they were doing 
well. As the stranger cannot live on what the na- 
tive hoards, he quickly pronounces the whole coun- 
try a farce. Disgustedly he classes the quartz with 
the placer and loaves the country. There is good 



52 



MINING AND SCIENTIFIC PRESS 



July 12, 1913 



quartz in Olancho, and intelligent prospecting 
will develop more, for aside from certain restricted 
areas, no one has left the highways to prospect. The 
native, as a rule, has no knowledge of hard forma- 
tions. I met some natives on the Mangualili grind- 
ing a soft honeycombed quartz on a metate, or be- 
tween two rocks. The quartz was well filled with 
coarse gold. They said the vein was about two inches 
wide : but as to where it might be, I thought it 
impolitic to ask. Prospecting one day in the val- 
ley of the Panal, I came across some mounds of ore, 
dirt-covered and grass-grown. A little farther on, 
beside the creek, was a group of metales, half buried 
in the soil, most of them just as the workmen had 
left them, probably to take part in the revolution 
for independence from the Spanish oppressor. Just 
across the stream was an old arrastre. 

The Water Question 

The water question is an ever-present one in all 
districts. In most districts of Olancho, water is 
present in streams sufficiently available for all pur- 
poses where capital is to be had to canal it to the 
workings, but many good placer grounds are too far 
away from a sufficient supply for operation by men 
of modest means. There is probably no locality in 
the department where ample water for milling pur- 
poses cannot be had, and there is no locality I know 
of but that is within reasonable distance of power. 
I visited one locality where it was reputed no power 
was available, but a short search proved that there 
was an available head of 500 ft., ample water for a 
dozen mines, with not over five miles to transmit 
the energy. This was an exceptional case, but as 
a rule, wherever a sufficient volume of water is 
found, the rapid drop of the valleys quickly makes 
the head. The eroded channels make numerous, ex- 
cellent, short-crested dam-sites, with material for 
construction close at hand. A necessary warning 
to those contemplating entering the country is that 
they be sure that the stream they select is one of 
sufficient volume in the dry season, for many of the 
streams go almost if not entirely dry at certain 
seasons. The only way to be sure is by actual ob- 
servation, for the natives cannot be trusted in this 
particular. The difference between what is really 
necessary and their idea of it varies so that abso- 
lutely no reliance can be placed on their estimates. 
Generating power at a point away from the point 
of consumption and transmitting it in the form of 
electric energy is far preferable to attempting to 
put in steam-power at points where water-power is 
not immediately available. To be sure, there is 
wood in abundance (the country is covered with 
forests), but getting in the heavy units required 
for a steam plant is almost prohibitive. 

Exports of iron and steel products from England 
during the first five months of 1913 amounted to 
$112,300,000, an increase of $25,270,000 over the 
same period of 1912. 

The Minster-Grenchenberg tunnel being driven 
under the Jura, in Germany, is giving considerable 
trouble caused by great pressure in the upper 
MiiM-riic formation. 



The Mclntyre-Porcupine Mill 

The following description of the 150-ton plant is 
abstracted from the annual report of the Mclntyre- 
Porcupine Mines, Limited: 

The ore is hoisted into an ore-bin. From this it 
is fed to a*10 by 12-in. Blake crusher, over a grizzly 
with bars IVi in. apart. The undersize joins the 
broken ore from the crusher and falls into a 12-in. 
elevator, which raises it to a hopper, from which 
it is automatically fed to a 16 by 36-in. set of rolls. 
The rolls discharge the ore to a 12-in. elevator 50 
ft. long, and is then hoisted to a 500-ton storage- 
bin. From there it is fed to a 6-ft. Chilean mill by 
means of a Challenge feeder. Four tons of cyanide 
solution, of a strength of 1% lb- per ton, is added 
to the Chilean mill for each ton of ore ground. The 
Chilean mill discharges the ore through a six-mesh 
screen to a Colbath classifier, which then discharges 
all ore over 100 mesh to the tube-mill. Ore finer 
than 100 mesh flows over the end of the classifier 
to a 16 by 24-ft. thickener. The tube-mill discharges 
the ground ore to a Frenier pump, which elevates 
it to a hydraulic classifier. This returns the free 
gold that ma)- have passed through the tube-mill, 
and the sulphides, coarser than 100 mesh, are again 
returned to the head of the Colbath classifier, which 
is supposed to retain, in the closed tube-mill circuit, 
the free gold and the coarse sulphides which con- 
tain most of the metal content of the ore. 

The overflow from the hydraulic classifier joins 
the overflow from the Colbath classifier and flows 
to the thickener mentioned. The proportion of the 
cyanide solution to the ore, at this point, is five to 
one ; one ton of dilution being added at the Colbath 
classifier and tube-mill. The thickener discharges, 
over the top, three tons of clear cyanide solution 
to each ton of ore fed in. This solution contains 
about 75% of the total gold in the ore, and is sent 
to a 12 by 20-ft. clarifying tank, to remove any 
traces of slime which may escape the thickener. 
Each ton of ore, with the other two tons of cyanide 
solution, fed to the thickener, is then discharged 
at the bottom to a 16 by 24-ft. agitator, which dis- 
charges continuously to a 20 by 24-ft. thickener 
and slime-storage tank. At the bottom of this tank 
each ton of pulp is discharged with one ton of cya- 
nide solution, which then is elevated to a 16-ton 
tank at the top of the mill, from which the Burt fil- 
ters are filled. A cake, ranging from 2 to 5 in. 
thick, is formed in the filter, which contains about 
20% of the gold-bearing solution, and after extract- 
ing this the doors of the filters are opened and the. 
cake is discharged. The gold solution from the 
clarifying tank flows through five 7-compartment 
zinc-boxes, where the gold is precipitated on zinc 
shaving and the solution passes into two tanks to 
be used as barren wash for the Burt filters. The 
precipitate is cleaned from the zinc shaving and 
sent to a tank. All solutions go to a 20 by 30-ft. 
concrete sump under the Burt filters, and from 
there are returned, by two triplex pumps, to two 
16 by 20-ft. cyanide stortage tanks situated at the 
top of the mill, where they are tested for loss of 
cyanide. 



July 12, 1913 



MINING AND SCI IN I II K I'KIAS 



f.l 



A Simple Plant for Testing Efficiency 



By A. T. Tyk 



The Cnniuien Copper Co. maintains n sampling an<l 
testing plant at ita concentrator at which tiny new- 
ores may be tested ns to concentrating qualities. 
These teats indicate clearly the relative economy of 
smelting or of concentration followed by smelting. 
As any number of carloads can be handled at the 
sampling plant, a representative sample of a 400 to 
600-ton lot can be secured without any additional 
expense or trouble. 

The crude ore crushed to one inch is first sampled 
by a bucket sampler with a ratio of 35 to 1. This 
sample is then crushed in 14 by 27-in. rolls and 
sampled by a second Snyder machine, ratio 5 to 1 ; 
crushed in 14 by 27-in. rolls, ground in a sample 



u 

S3 




























\ / 




DIAGRAM OF TESTING PLANT. 

grinder, and finally sampled by a Vezin sampler, 
with ratio 12 to 1. 

The final reject from the Vezin sampler is used 
as the basis of the test, and the average assay is 
secured at once from the lot sample. The largest 
particle in the reject is about one-eight inch in 
diameter. For low-grade ore or uniform ores, mate- 
rial of this size would require a sample of about 20 
lb. The reject, however, from a 20-car lot will 
amount to several hundred pounds, which is quar- 
tered down and crushed if necessary until a lot of 
100 kg. has been obtained for testing. 

Testing the Ore 

The reject from the sample mill after cutting 
down, is dried in a steam drier until all moisture 
has been expelled, and is then ground in a Braun 
pulverizer to pass 20 mesh. This fine material is 
carefully riffled down to obtain the general assay 
sample of the crude ore for analysis. One hundred 
kilograms of this sample is weighed and deposited 
in the hopper (A) over the feed-box of the Wilfley 
table. The ore is fed to the table at about the same 
rate as in regular mill work, depending on the 
amount of concentrate to be taken, the rate of feed 
being slower with a lower ratio of concentration. The 
coarse concentrate is discharged into tubs (C) and 



the water and slime from same delivered into tank 
(P) to be pumped to the vanner (I) together with 
the Wilfley tailing and slime. The concentrate is 
run low in silica if the mine is at a great distance 
from the smelter, or fairly silicious if the concen- 
trate contains considerable iron and sulphur and 
when the smelter is in close proximity to the con- 
centrators, as at Cananea. In every way, the tests 
are made to conform to actual milling conditions. 

Sand and Slime 

The coarse sand and slime are discharged at (B) 
and are delivered into tank (D), from which the 
coarse tailing is finally discharged at (E), dried, 
weighed, and sampled. The slime overflows from 
(D) into tank (F), from which it is pumped to the 
vanner (I) by a centrifugal pump (G) run by %-hp. 
motor (H). The slime is concentrated on an ordi- 
nary mill vanner and the concentrate collected in 
(J), and dried, weighed, sampled, and assayed. 
The tailing from the vanner is the only material not 
weighed directly, and it is determined by differ- 
ence. All the remainder of the products are care- 
fully dried, weighed, cut down, and assayed in du- 
plicate. The final vanner tailing is carefully sam- 
pled every three minutes, as this is a final check 
on all former weights and assays. Tank (D) is 
filled with water before starting, so that the coarse 
sand settles out and slime is at once discharged to 
the vanner feed. 

Tadle I. — Composite Test No. 469 

ANALYSIS OP ORE 

Cu, 2.22%; SIO = . 71.2%; Fe. 9%; S, 9.7%; Ag, 1.10 oz.; Au, tr. 

Ore passed 20 mesh and run on Wilfley table. 

Pounds. Cu, %. Cu, lb. Ag, oz. Au, oz. 

Feed 2000 2.22 44.40 

Coarse cone. ... 470 6.20 29.14 3.20 0.03 

Coarse tall 705 0.36 2.53 

Overflow 825 1.54 12.73 

Overflow re-treated on vanner as follows: 

Pounds. Cu, %. Cu, lb. Ag, oz. Au, oz. 

Feed 825 1.54 12.73 

Fine cone 65 4.96 3.22 3.20 0.03 

Vanner tail. ... 760 1.25 9.51 

Ratio. Per cent. 

Wilfley 4.25 Into 1 Saving 65.60 

Vanner 12.60 " 1 " 25.20 

General 3.73 " 1 " 72.88 

ANALYSIS OF PRODUCTS 

Cone. Cu,%. SiO„%. Fe,%. S,%. Ag, oz. Au.oz. 

Coarse 6.20 19.2 31.8 36.0 3.20 0.03 

Fine 4.96 61.0 12.2 13.0 3.20 0.03 

General 6.04 3.20 0.03 

One ton of this ore made: 

Pounds. Cu, %. Cu, lb. Ag, oz. Au, oz. 

Cone 535 6.04 32.36 

Tail 1465 0.82 12.04 

General ratio, 3.73 into 1. 

General tailing. 0.82% Cu. 

General saving, 72.88%. 

Per cent. 

Copper lost in coarse tailing 5.69 

Copper lost in fine tailing 21.43 

Copper saved 72.88 



54 



MINING AND SCIENTIFIC PRESS 



July 12, 1913 



Table II. — Comparison of Results with Actual Milling 



CRUDE ORE — A 











-Taillng.- 




Test No. 






Vanner. 


Coarse. 


General. 


394 






0.86 


0.32 


0.63 


402 






0.80 


0.34 


0.55 


Sections C 


and 


D 


0.74 


0.35 


0.53 








0.75 


0.37 


0.55 


Sections A 


and 


B .. 


». 0.85 


0.31 


0.55 








0.86 


0.33 


0.56 








CBUDE ORE — B 














Tailing 


\ 


Test Nn 


• 




Vanner. 


V. u a I ' . 


UVUU ill. 


408 






40 


0.40 


0.40 


427 






52 


0.32 


0.42 


439 






70 


0.38 


0.53 


449 






70 


0.34 


0.52 


Sections A 


and 


B 


0.45 


0.33 


0.44 








0.47 


0.39 


0.40 








0.60 


0.33 


0.47 








0.56 


0.37 


0.45 








0.43 


0.35 


0.45 








0.52 


0.32 


0.53 








0.65 


0.28 


0.44 



The tailings represent ed are from a tonnage of 
500 to 1400 per day. At the Cananea concentrators, 
the ore comes from a great many different orebodies, 
so that unless treated in a separate section, the feed 
nearly always contains a mixture of different ores. 
For this reason it is difficult to obtain tailing in 
actual ore-dressing, from one ore only. The copper 
in the feed may vary from a little over 1% to over 
3% ; the iron from 5 to 20 ; sulphur from 5 to 20 ; 
and insoluble 49 to 83%. But, as shown above, the 
tailing from entire sections of the concentrators 
agrees closely with that obtained in the tests, and 
this holds true for other ores, when they have been 
concentrated without intermixture. 

Separate tests are made on each ore every month 
to credit the different mines with the amount of 
copper they have added to production and to deter- 
mine what grade of ore must be mined to pay all 
expenses of mining, transportation, concentration, 
smelting, and losses. Diagrams are constructed 
which show the actual profit above all expenses, so 
that the profit can be read off at once for whatever 
grade of ore is being mined. 

Composite Tests 

From every sample of crude ore brought to the 
concentrator, 15 kg. of the final sample is weighed, 
dried, and pulverized, and deposited in large dust- 
proof boxes. At the end of the month this ground 
ore is riffled down until 100 kg. remains, and this 
serves as the basis of the test of each separate ore. 
Table III. — Comparison of Results foe January 

Smelter Concentrator Composite 





office, %. 


office, %. 


test, % 


Moisture in concentrate. 


.. 15^)5 


13.45 


13.70 




. . 2.22 


2.22 


2.22 


Cu in concentrate 


. . 6.17 


6.27 


6.05 




. 0.83 


0.76 


0.82 




. 72.31 


74.85 


72.88 


Ratio 


3.84 


3.77 


3.73 



Besides these separate tests, a composite mill-test is 
made of all the ores milled during the month, mixed 
in the same proportion as milled. This is done for 
several reasons. It gives a criterion by which to 
judge the work of the concentrators. The results 
indicate in concrete form the general tailing, feed, 



extraction, etc., and show what extraction should be 
shown by the credits from the smelter receipts of 

concentrates. 

January Results 

Results of comparisons for January 1913 are 
shown in Unble II, based upon price of copper 17c. 
per pound with 96% saved in smelting, or 16.3c. per 
pound. The cost of smelting, including fuel, power, 
labor, supplies, repairs, salaries, general expenses, 
sampling, roasting, converting, fluxes, fettling, amor- 
tization, interest, transportation, refining, freight, 
and selling, is taken at $3.10 per ton. Ratio of con- 
centration, 5.6 into L Therefore, the cost of smelt- 
ing the concentrate per ton of crude ore is $0.55. 
Cost of concentration, $0.72 per ton. Cost of min- 
ing, $1 per ton. Total expenses per ton of crude 




/.So /.40 i3o 120 no /oo 



PROFIT AND EXTRACTION LINES 

ore, $2.27. Crude ore assaying 1.48% Cu gives an 
extraction of 78.8%, or 23.32 lb. at 16.3c, equal to 
$3.80 less $2.27 expenses, leaving $1.53 profit per 
ton. Crude ore assaying 1% Cu gives an extraction 
of 68.5%, or 13.7 lb. saved at 16.3c. per lb., equaling 
$2.23, less cost $2.27, leaving a loss of $0.04 per ton. 
Therefore the critical point between profit and loss 
is at 1.03% Cu in the feed, as per diagram. 

It would require a great part of the time of an 
office man during the month to tabulate and calcu- 
late the tons of wet ore, tons of dry ore, tons of dry 
concentrate, and similar data from all the mines and 
concentrators, and to note all the various deductions, 
to determine the average of the ore, of concentrate, 
tons of copper in the feed, tailing, and concentrate, 
and the extraction. The same results can be deter- 
mined by a monthly composite test requiring less 
than two hours. 

It might appear that close results could not be 
obtained in this manner, that from only 100 kg. of 
ore the same results could not be determined as 
by actually milling 66,000 tons of ore per month. 
And yet it is the same comparison as between an 
assay-ton weight of pulp and a thousand tons of 
ore which it represents. If the ore has been prop- 
erly cut down and quartered, the assay of the few 
grams of pulp will indicate accurately the contents 
of the thousand tons of ore. Likewise the 100 kg. 
will give the same comparative results as the con- 
centration of thousands of tons in the various sec- 
tions of the concentrator. 

"What a concentrator actually recovers is not nec- 



July 1-', l'JU 



MINING AND SCIENTIFIC PRESS 



55 



essarily the calculuud total . it in the tons of copper 
the sniclter actually credits it with. Therefore, com- 
paring the extraction shown by tho composite tests 
over several months with what is actually acknowl- 
edged by the smelter, as the tons of copper received 
as in Table III, shows the accuracy of the composite 
teats. There is a slight variation from month to 
month, as all the concentrate produced some months 
ago may not be shipped and is credited to the fol- 
lowing months. 

Table IV 



, Extraction. , 

Month. Composite. Smelter. 

January 76.00 74.69 

February 76.60 73.95 

March 72.60 71.15 

April 76.60 77.50 

May 73.80 72.60 



Average 75.00 74.00 



The composite checks within 1% of the smelter re- 
turns, which difference is partly covered by loss in 
transit and variations in concentrate moisture de- 
terminations. This is as close as can be calculated 
from the crude ores and concentrates with their vari- 
ous assays and moisture determinations. In calcu- 
lating the results, the percentage of moisture in the 
concentrates delivered to the smelter is likely to be 
the most prolific source of error, and the credits to 
the concentrator vary accordingly. With dissemi- 
nated porphyry ores, the average concentrate sample 
per shift or day can be accurately determined, which, 
with the feed and general tailing, gives the neces- 
sary data for calculating the rates and saving. At 
Cananea, however, with coarse bull-jig and fine con- 
centrate mixed, it is almost impossible to obtain 
such a sample, and each carload of concentrate is 
sampled separately. 

Standard v. Miniature Machines 

Possibly the majority of mining men are of the 
belief that a concentration test on a new ore can- 
not be made on a small scale, and if so, that the 
testing plant must contain miniature jigs, classifiers, 
tables, and vanners. The difficulty with so many 
small machines is the error incurred in starting and 
cleaning-up afterward, and the additional doubt 
whether, after all, the small machines do duplicate 
the work of the larger machines in mills. For this 
reason, at Cananea, the tests are made on a regular 
full-sized Wilfley table and vanner which at other 
times are used in everyday work, and in the same 
state of repair as the general average. With these 
machines, the test gets under way rapidly and is 
finished quickly. The greater part of the time the 
machine is running as in ordinary millwork. The 
Wilfley acts as a classifier, as also the settling-tanks. 
The coarse grains of concentrate protect the finer 
grains, and the latter are saved along with the 
coarse, thus relieving the vanner of part of the load 
and making up in part for lack of classification and 
stage-crushing. The Wilfley and vanner also get 
more individual attention than in a concentrator, so 
that, on the whole, there is a series of compensa- 
tions which about equalizes different conditions. If 
tests on small lots of ore have not been successful, 
it is probably on account of carelessness in not secur- 



ing a really representative sample from the mine, 
and not the fault of the totting plant. 

Conclusions 

1. This method of testing has been in use for sev- 
eral years at Cananea. 

2. It has been successfully tried out on a great 
variety of ores. 

3. Compared month by month with tonnage up to 
66,000 per month, it has given results within 1% of 
actual smelter returns. 

4. The machines used are full-sized standard Wil- 
fley and vanner machines. 

5. The machines employed in testing are those 
used every day in regular mill work and in the aver- 
age state of repairs. 

6. The testing plant can be fitted up at small ex- 
pense in almost any concentrating plant. 

7. New orebodies, or regular ores at greater depths 
can be tested and their behavior in large concen- 
trators milling thousands of tons may be determined 
very closely. Even in large units the tailing and 
other products will vary somewhat from day to day. 

8. These tests quickly give accurate data for re- 
ports on mining property as to the probable be- 
havior of an ore, and give valuable information 
which may serve as the basis of experiments in a 
large testing works. 

Thanks are due to F. J. Strachan, superintendent 
of the Cananea concentrators, for permission to pub- 
lish the foregoing data. 

Kleinfontein and Tube-Mills 

The annual report of the Kleinfontein mine for 
the year 1912 contains some interesting features sup- 
plied by the consulting engineer on the results of 
development and the value of the tube-mill as an 
adjunct to the stamps. It is stated that the stamp 
and tube-mill combination introduced as an expedi- 
ency last year has not been such a success as gen- 
erally supposed for the reduction of costs, which, 
since the introduction of tube-mills, have increased 
from 4s. 2d. per ton with stamps only, to 4s. 5d. 
per ton with stamps and tube-mills combined, while 
the percentage of extraction has fallen from 95.79 
to 94.60. It need hardly have been pointed out that 
these unsatisfactory results of the introduction of 
tube-mills are not the rule on the Rand, for gener- 
ally the costs are lowered and the extraction per- 
centage is increased by the addition of tube-mills. 
One group by employing 15 stamps only to one tube- 
mill can handle the same tonnage as that at New 
Kleinfontein at a shilling per ton less in cost, and 
moreover are introducing tube-mills so as to attain 
this proportion with the direct aim of hanging up 
stamps because they are less efficient and economical 
than tube-mills. The Barnato group, too, find that 
the addition of tube-mills last year added consid- 
erably to the efficiency of the mill, using stamps 
solely, as well as to the extraction. 



Expenditures on the Panama canal during the 
year ended June 30, 1913, amounted to $41,741,000, 
making a total of $318,229,000. 



5.; 



MINING AND SCIENTIFIC PRESS 



July 12, 1913 



Searles Lake Potash Deposits 

By H. S. Gai.e 



•Searles lake, also known as Borax flat, is a dry 
lake basin and superficially much like many other 
desert basins of the Western arid regions. It is a 
broad somewhat circular valley or depression lying 
between the Slate and Argus ranges in the extreme 
northwestern part of San Bernardino county, Cali- 
fornia, near the corner between that county and 
Kern and Inyo counties. The camp known as 'The 
Borax' is about 25 miles by road from Searles post- 
office, formerly Garden station, near the Mohave- 
Owenyo branch of the Southern Pacific railroad. 
Searles lake at present may be reached by the regular 
stage that runs from Johannesburg via Garden sta- 
tion, or Searles, to Searles lake, and thence on to 
Ballarat and Skidoo. 

Analysis of Brine 

The public announcement of Searles lake as a pos- 
sible source of potash was made as the result of the 
collection and analysis of a representative set of 
brine samples from this deposit early in March 
1912, by E. E. Free, then of the United States Bu- 
reau of Soils.'and Hoyt S. Gale, of the United States 
Geological Survey. A notice was at that time given 
to the press stating that reports which had been re- 
ceived concerning the unusually high potash content 
of the brine in the deposit were apparently con- 
firmed by the results of these tests. Analyses of six 
brine samples taken at considerable depth in old 
wells at points distributed over the main salt flats 
showed that an average of 6.78% of the total dis- 
solved salts was potash, quoted in the form of the 
oxide (10.73% as potassium chloride). The indi- 
vidual results obtained were 7.63, 6.23, 6.89, 6.06, 
7.27, and 6.57%. The uniformity of these results 
was taken to indicate, although of course it did not 
prove, homogeneity in composition of the brine 
throughout the salt deposit. Based in part on the 
logs of the wells that had already been drilled, the 
statement was also made at that time that "existing 
data give reasonable assurance that the brine-satur- 
ated salt body is at least 60 ft. thick and covers an 
area of at least 11 square miles. Assuming the salt 
to contain 25% by volume of the brine, the total 
amount of potassium oxide available is estimated as 
over 4,000,000 short tons [equivalent to approxi- 
mately 6,000,000 tons as potassium chloride]. This 
estimate is based on incomplete data, but it is be- 
lieved to be conservative. At any rate it appears 
that this locality constitutes a very important source 
of potash in readily available [soluble] commercial 
form." Whether it will be possible to recover all 
of this potassium commercially, however, must re- 
main for practical experience to demonstrate. 
There seems to be good reason for the belief that 
the commercial operation of this deposit for potash 
and the other marketable salts that it contains will 
become a large and important enterprise. Probably 

•From advance chapter on potash in 'Mineral Resources 
of the United States for 1912,' published by the United 
States Geological Survey. 



the first chemist to suggest that potash might be- 
come one <4' the profitable products of this deposit 
was Whitman Symmes, a mining engineer of Cali- 
fornia and Nevada, who in 1898 was superintendent 
of the California Borax Co., operating at Searles 
lake. 

Nature of the Deposits 

The saline deposit at Searles lake resembles a 
typical playa, of which examples are common in the 
desert basin region. The salt-incrusted surface oc- 
cupies the lowest part of the valley or basin in which 
it is situated. The drainage basin tributary to it is 
without outlet, so that if the basin were filled the 
water would rise to a height of approximately 640 
ft. above the level of the present salt flat before it 
would find an outlet and overflow into the Panamint 
valley to the south and east. That the valley was 
thus flooded at some time in the past is attested by 
the series of shore lines to be seen encircling the 
basin, the highest clearly marked reaching the ele- 
vation of the present lowest divide on the southern 
margin with successively lower concentric shore 
lines, marking the recession of the waters as they 
evaporated and as the lake level subsided. The 
saline deposit in the lowest part of this basin is the 
residual product of the evaporation of natural drain- 
age waters. 

It appears at this time to be quite clear that the 
greater part of the water of the former higher level 
of Searles lake was derived by overflow from Owens 
lake and hence came chiefly from Owens river. All 
natural river waters contain some dissolved salts. 
By long-continued accumulation within a restricted 
basiu from which little or no water is lost by over- 
flow and the water disappears by evaporation alone, 
the solutions become gradually more and more con- 
centrated with salts, and eventually if the lake ap- 
proaches complete dryness these salts are deposited 
as a more or less massive crystalline body. This is 
evidently what has taken place in the basin of 
Searles lake. The final evaporation of this large 
lake is supposed to have resulted from the failure of 
the principal source of its water supply, when pos- 
sibly with a general lowering of humidity of climate 
a slight decrease in the flow of Owens river caused 
Owens lake to cease to overflow the divide on its 
south side. 

Structure 

The physical status of the main saline deposit 
in the bed of Searles lake today is revealed 
by a large number of borings that have been put 
down by private interests in various explorations of 
the salt beds and by the analyses that have been 
made from them. So far as has been determined, the 
main salt body appears to be a bed at least 11 or 12 
square miles in extent and having a depth of 60 to 
70 ft. A much greater quantity of salts doubtless 
exists beyond the central area of the more solid salt 
mass thus defined. This body of salts is chiefly 
crystalline, in part compact, but in general is be- 



July 12, 1913 



MINING AND SCIENTIFIC PRESS 



57 



Ueved to be of cellular or open crystalline structure, 
being really a body of nulls standing iu the residual 
brine from which it has crystallized. Experiments 
in the wells that have been put down appear to 
show that this brine is in nearly all parts of the salt 
bed free to flow and that it stands high iu the de- 
posit, approximately at the actual surface of the 
salts. Thus the brine constitutes the ground-water 
level of this part of the basin, occasionally after wet 
periods flooding to a shallow depth over the surface, 
but generally dispelled by the rapid evaporation of 
this dry climate until its level sinks below the reflect- 
ing white surface of the salt crust Evaporation at 
this surface is presumably continuous, the body of 
the ground water being as continuously replaced by 
inward seepage from the marginal alluvial slopes. 
Little sediment other than wind-blown dust is ever 
spread out upon the main salt plain by the occas- 
ional floods, and the salt of the central part of the 
deposit appears white or tinged with pink and for 
the most part comparatively clean. 

Composition 

JIany analytical data as to the composition of the 
mass of crystallized salts of this deposit are in ex- 
istence. On the salt as distinguished from the brine, 
which will hereafter be discussed, the Survey has at 
present no original data, for they could be had only 
from carefully collected samples obtained during the 
drilling in the deposits. There is good reason to be- 
lieve, however, that, the salts as well as the brine 
contain a considerable percentage of potash. Some 
of the private analyses from this deposit have been 
made public in a recent article. Several analyses, 
chiefly of the brine, have been made by the govern- 
ment bureaus and should give accurate data as to 
the composition of this part of the deposit. The 
following are the more complete analyses of the 
brine made from the samples collected at Searles 
lake March 6, 1912, now published for the first time : 



salts that might be derived therefrom the following 
result is obtained. This is the approximate com- 
position of the anhydrous residue which results from 
the complete desiccation of the brine. 
Hypothetical Ayekaue Compohitiom or AniiTuaoua Rehidue 
or Bust rnou Sea bum Lake Hasin 

Per cent. 



Sodium chloride (NaCI) 81.61 

Sodium sulphate (Na,SO.) 19.12 

Sodium carbonate (Na.CO,) 12.79 

Sodium blborate (Na.B.O,) 2.23 

Potassium chloride (KC1) 12.07 

Sodium arsenate (Na,AsO,) 0.17 



99.09 

The original brine contains a variable percentage 
of bicarbonate, which is converted to the carbonate 
form in the anhydrous residue and is so expressed. 

As is well known, the theoretical composition of 
salts in the brine, as shown by the calculations from 
the analyses, can be accepted as a working basis 
only with certain reservations. Doubtless most of 
the salts named in the conventional method of com- 
puting the analysis of a solution may be abstracted 
from the brine somewhat in the proportions given, 
provided that satisfactory chemical processes can be 
devised to accomplish the desired result. It is be- 
lieved that this has already been at least partly ac- 
complished experimentally. But it is also true that 
no practical process of extraction on a commercial 
scale will derive all these salts in the amounts shown. 

Working Plans 

Estimates of other available constituents similar 
to the estimate of the total available potash in the 
deposit can be readily computed on the basis of 
analyses of the salts and the brine. At present the 
plans for working the deposit contemplate the man- 
ufacture of the salts from the brine, which, as a 
liquid capable of being pumped from place to place, 
is more readily susceptible of manipulation than 
the solid salts. Preliminary estimates of quantity 



Composition of Bbine fbom Seables Lake, California 
(Percentage of ignited residue. Walton Van Winkle, analyst.) 





Austin 




Well 


Austin 


Well 


Well 






well 


Well 


S.E. 


well 


S.E. 


S.E. 






U. 


W9. 


No. 8. 


, <w 


No. 7. 


No. 4. 


Average. 


StO, '. 




0.03 


0.00 


0.00 


0.00 


0.03 


0.02 






0.06 


0.05 


0.06 


0.06 


0.08 


0.06 






0.00 


0.00 


0.00 


0.00 


0.00 


0.00 


Ca 


0.00 


0.00 


0.00 


0.00 


0.00 


0.00 


0.00 


Na 


33.37 


32.57 


33.16 


33.92 


33.23 


32.90 


33.19 


K 




7.27 


5.98 


5.54 


6.29 


5.69 


6.22 






7.95 


6.65 


6.89 


6.85 


6.94 


7.11 


SO, 




12.49 


13.41 


11.89 


13.79 


13.00 


12.76 


CI 




35.53 


36.50 


37.13 


36.40 


36.79 


36.39 


B 4 0, 




1.58 


1.77 


2.03 


2.08 


4.14 


2.45 


Total 


98.42 


97.48 


97.52 


97.46 


98.70 


99.57 


98.20 


Total salts (ignited residue, 


percentage of original 
















33.48 


33.94 


33.30 


32.96 


33.21 


32.88 


33.30 




1.3002 


1.3045 


1.2969 


1.2935 


1.2959 


1.2932 


1.2974 



Each sample was collected by lowering a stop- 
pered and weighted bottle to a depth of 35 to 40 ft. 
in the brine and then, by means of a separate cord 
provided for the purpose, jerking out the stopper 
and allowing the bottle to fill. 

By recalculating the average results of these six 
analyses to a theoretical or possible combination of 



of production have been made on the basis of the 
composition of the brine and on an assured con- 
stancy of composition under continued pumping. 
As to the composition of the brine, the analyses 
here quoted are now available, and as to the con- 
stancy of the brine under pumping, there is oppor- 
tunity for experimental verification of hypotheses. 



58 



MINING AND SCIENTIFIC PRESS 



July 12, 1913 



It is recognized that, in general composition, 
desert basin salines are quite distinct from salines 
that have been produced by the desiccation of ma- 
rine waters. The Stassfurt salts are similar to the 
deposits that would be left by the evaporation of 
normal sea-waters. They contain soluble magnesium 
salts as an important constituent, especially in con- 
junction with the potash-rich portions of. the depos- 
its. Most of the desert basin salines in the United 
States are more or less of the Searles lake type — 
that is, they are composed largely of chlorides, but 
contain considerable proportions of sulphates and 
carbonates, chiefly of sodium with some potassium, 
and little or no soluble magnesium salts. The desert 
basin salts may be described as salines derived by 
the direct leaching of continental areas, as distin- 
guished from salts of direct marine origin. Ulti- 
mately both classes may be said to have had a com- 
mon origin. 

It is still too early to offer any general summary 
statement regarding the industrial situation at 
Searles lake. An immense mass of salts and an 
equally great volume of saturated residua] brine 
exist in this deposit. The compositions of the salt 
and brine are fairly well determined. Several of 
the ingredients which could be extracted have an 
established value in the chemical markets generally, 
and some, like sodium sulphate, have potential value. 

Withdrawal from Entry 

The lands at Searles lake were withdrawn from 
entry by an order approved February 21, 1913. This 
withdrawal is not intended to interfere with any 
valid mining claims that existed prior to the with- 
drawal, a fact that is made clear in the express 
wording of the order itself: "This withdrawal is 
made subject to all rights lawfully initiated under 
any valid mining locations made upon such lands 
so long as such rights are maintained in full com- 
pliance with the law." In order to relieve the 
existing uncertainties regarding the validity of 'pot- 
ash' or general placer locations carrying saline de- 
posits in large area, a draft of a law has been pre- 
pared and submitted to the appropriate committee 
in Congress, which it is believed will provide a sat- 
isfactory title basis under which such lands can 
be worked. It is to be hoped that in the interest 
of a possible American potash production the mat- 
ter may receive due consideration and that enact- 
ment, of a proper measure to this end may be ac- 
complished. 

Iron Production for 1912 

The iron ore mined in the United States in 1912 
amounted to the great total of 55.150,147 long tons, 
compared with 43,876,552 tons mined in 1911, an 
increase of 11.273,595 tons, or 25.69%, according to 
an advance statement by Ernest P. Burchard, of the 
United States Geological Survey. The production 
for 1912 was second only to the output of 1910, fall- 
ing 1,864,759 tons below the record production of 
that year, which was 57,014,906 long tons. 

The Minnesota iron ranges are producing at pres- 
ent considerably more iron ore than is produced in 
all the rest of the states together, having furnished 



nearly 62.5% of the total for the United States in 
all the mines in Minnesota and Michigan and part 
of those in Wisconsin, mined 46,368,878 tons in 1912, 
or nearly 84.08% of the total. 

The total quantity of ore marketed in 1912, ac- 
cording to reports received by the Survey, was 57,- 
017,614 toril, valued at $107,050,153, compared with 
41,092,447 tons, valued at $86,716,575, in 1911. The 
marketed production, therefore, represents an in- 
crease in quantity of 15,925,167 tons, or 38.75%, 
and in value of $20,333,578, or 23.45 %. The aver- 
age price per ton in 1912, according to these figures, 
was $1.88, compared with $2.11 in 1911. According 
to the reports of producers, many of which have 
been somewhat revised since the report for 1911 
was published, the total quantity of iron ore in 
stock at the mines at the close of 1912 amounted 
to 10,241,287 tons, compared with 12,206.390 tons 
at the close of 1911, a reduction of 1,965.103 long 
tons, or 16.1%, which balances closely with the ex- 
cess of sales over quantity mined. 



Gravel Plant in Nevada 



The following is a description of T. Wilson's 
plant in operation in the main Manhattan gulch, as 
published in the Manhattan Post. The main feature 
about the hoisting machinery is an endless double- 
chain elevator with shallow buckets every two feet, 
the two chains making an elevator about 20 in. 
wide. This hoists the gravel from a feed-bin of 35- 
cu. yd. capacity, at the bottom of the shaft, on bed- 
rock, 65 ft. below the collar of the shaft, up to a stor- 
age-bin which holds about 25 cu. yd. of gravel, this 
bin being about 25 ft. above the surface. Prom the 
storage-bin the gravel is sluiced whenever sufficient 
yardage has accumulated. Prom the chute of the 
storage-bin, the gravel falls into a revolving trom- 
mel made of heavy screen of sufficient mesh to allow 
rock of 1% inches in size to fall through, the over- 
size working out at the lower end into a chute and 
from there to the waste pile. A steady stream of 
water is played on the trommel, washing the loose 
clay from the rocks and gravel which holds the gold. 
Directly below the trommel is the shaker, a box 
similar to a sluice-box, but with deep riffles, cross- 
wise, every 2 in. of its 12-ft. length. By means of 
an ingenious system of pivots, this box is rapidly 
shaken, with a play of about three inches, endwise, 
and an inch up and down. At the lip of the shaker 
three small copper plates are fixed. The gravel falls 
from the shaker, passes over these plates, and any 
fine light gold which will not settle readily between 
the riffles becomes amalgamated with the quicksilver 
on the plates, and then is soon caught by the lower 
riffles. Below the plates a line of sluice-boxes, all 
containing riffles, some cross and some lengthwise 
with the boxes, extends for about 150 ft. The small 
percentage of gold which escapes the shaker box is 
caught in the travel down these boxes. Mr. Wilson 
estimates that over 90% of the gold is caught by 
the shaker. The power for the elevator, trommel, 
and shaker is obtained from a 15-hp. Westinghouse 
motor. About 15,000 gal. of water is added to the 
supply each day. 



July 1J. l!U:i 



MINING AND SCIENTIFIC PRESS 



59 



Relation of Faulting and Mineralization in Goldfiekl 



liy OOMUN Barnkn and E. A. Byler 



That portion of the Goldfield mining district 
which Iui8 so far proved the most productive, in- 
cludes the Qoldtield Consolidated and Florence 
mines, and it is here intended to point out the re- 
lation existing lietween the Columbia Mountain 
fault and this mineralization. 

System of Fissuring 

F. L. Ransome, in his report on the Goldfield dis- 
trict, suggested a relation between this fault and 




GOLDFIELD DISTRICT. 

the ore deposits of this portion of the district, but 
while the extent and character of the fault were 
well demonstrated, there was not at that time 
sufficient development in the underground workings 
to determine its relation to the ore deposits. Later 
developments have furnished information from 
which this relation may be deduced, and the general 
system of mineralization outlined. 

This fault, as shown on the plan map, is traceable 
along the surface from its northern end near the 
Conqueror mine shaft, south a distance of some two 
miles to the vicinity of the Red Top, where it dis- 



appears beneath the dncite. It may be followed 
underground from here fairly close to its southern 
end, by means of the relative positions of the differ- 
ent formations, as disclosed in the underground 
workings. Its approximate position on the surface 
south of the Red Top is indicated on the map by a 
dotted line. 

Between the January and the Florence it makes a 
sharp bend to the east, and then again to the south 
to its southern extremity, where it ends at an east- 
west fault. At its northern extremity the manner 
of its ending has not been disclosed, but it appears 
here also to end at an east-west fault which prob- 
ably extends to Diamondfield. The dip of the fault 
is to the east, all that part north from the January 
having a regular dip, averaging about 28 degrees. 
From the Florence south the dip is much steeper to 
the east, the amount of which has not as yet been 
determined, but is probably about 60 degrees. 

Mr. Ransome has concluded that the main move- 
ment of the Columbia Mountain fault was prior to 
the dacite intrusion, and that it occurred in the 
andesite and in the underlying rocks. Then came 
the intrusion of the dacite through the latite, to the 
fault and across it, and into the latite-andesite con- 
tact, lifting up the andesite which has in places since 
been eroded leaving the dacite at the surface. This 
conclusion has been disputed by some, but there 
seems abundance of evidence to support it, and 
Ransome 's idea is now generally accepted. 

Situation of Fault Zone 

Section I, as shown in the illustration, is through 
the Mohawk, Grizzly Bear, and Merger Mines Co. 
shafts. This section furnishes data for a close loca- 
tion of the fault zone on its dip, and work now in 
progress on the Grizzly Bear and the shaft of the 
Merger Mines Co. will still further demonstrate it. 
The fault zone, shown in this section on its dip, is 
approximately the sloping fault-contacts of dacite 
with latite, and latite with shale, and at deeper 
workings probably the fault-contact of shale with 
alaskite. The downward throw on the east side of 
the fault has not been sufficient in amount to allow 
the approximately horizontal layers of latite and 
shale to entirely pass their corresponding layers on 
the west side ; therefore, the fault zone in places 
passes through latite upon both sides, and similarly 
through shale. In consequence of the dacite intru- 
sion across this fault along a portion of its length, 
which practically obliterated it to a depth of some 
Ihree hundred feet, it follows that the relative 
position of the geological formations caused by the 
fault do not properly show above or at this in- 
trusion, though they do below it. 

After the dacite intrusion, there has been a fur- 
ther small movement along this fault zone, and 
where the intruded dacite lies across the upward 
extension of the zone, no pre-existing fracture is 
present ; and the movement, while following in gen- 
eral the extension, has been recorded in irregular 



60 



MINING AND SCIENTIFIC PRESS 



July 12, 1913 



fractures extending upward to the surface, having a 
steeper dip and connecting below with the fault as 
shown in section I. The mass of eruptives and 
solidified dacite intrusion has settled irregularly, 
due to the additional movement of the fault in its 
original position below, and we consequently find 
many irregular fractures extending from this fault 
zone to the surface. These fractures connect below 
and finally with depth merge with the original fault 
zone ; the foot-wall of which in effect forms the foot- 
wall of the mineralization. 




SECTIONS THBCUOH FAULT ZONE. 



South of the January, where the fault makes a 
sharp bend to the east, there seems a probability of 
the existence of a cross-fault which would account 
for the difference in dip of the fault north and south 
of this bend. There is some evidence that this fol- 
lows the east-west contact between the dacite and 
andesite. There is, however, no conclusive proof of 
the existence of this cross-fault, as there are in- 
sufficient workings penetrating the latite, in which 
formation would be recorded the entire movement, 
while in the dacite above would only be recorded the 
later small movement subsequent to the dacite in- 
trusion, which may have b/en distributed in such a 
way as to make its existence not apparent. 

As shown in section I, a cross-cut west from the 
Mohawk shaft on the 450-ft. level penetrates a body 
of dacite, the position of which indicates that it is n 
dike, and while there are not workings enough at 
proper depth to the north to prove it all, the evi- 
dence supports the idea that this is a dike of dacite 
with a north-south direction with apparently greater 
width north of the Laguna, which is probably the 
source of a portion of the dacite intrusion. If this 
dike is as suggested, and wider to the north of the 



Laguna, it will be expected that the fault in break- 
ing its way upward through this dacite will show 
greater irregularity than would otherwise be ex- 
pected. Generalized section II illustrates this situa- 
tion and practically represents the conditions exist- 
ing as far nyrth as the end of the dacite area, in the 
vicinity of the Berkeley property. 

Mineralization 

The various orebodies of the Goldfield Consoli- 
dated and the Florence mines are directly connected 
with this Columbia Mountain fault zone; all of 
them being either in the zone itself or in the irregu- 
lar fractures extending from it upward. It seems 
reasonable, therefore, to conclude that this fault has 
been the connecting channel to the deep seated 
source of mineralization, and the path for mineraliz- 
ing solutions. 

"What is believed to be primary ore has already 
beeen found on the 1300-ft. level of the Grizzly Bear 
in this fault zone. The natural tendency, in a fault 
as flat as this, is a closing of the fracture by com- 
pression, and the consequent difficulty of the cir- 
culating waters to maintain their open channels. 
This accounts for the larger size of the orebodies in 
the upper ami more nearly vertical and irregular 
connecting fissures than in the main channel below. 
It is reasonable to expect that the deposition of 
mineral in the channel itself as depth is increased 
will be of less thickness, while in the steeper inter- 
secting veins it will not be so much restricted. 

Relation of Mineralization to Faults 

The mineralization appears to depend entirely 
upon the system of Assuring, and there appears to 
be no essential relation between the ore deposits 
and the different kinds of eruptive rock in which 
they exist, and references to the different kinds of 
rock are made here for the purpose of exhibiting 
the system of faulting and Assuring. There has 
been some cross-faulting both prior to and after the 
deposition of the ore, which has not been mentioned 
here, and has to some extent modified the uniformity 
of the fault and connecting fissures, but has not 
substantially altered the general scheme. 

To the north of the Berkeley property the condi- 
tions are somewhat simplified by the absence of the 
dacite intrusion. This situation is represented in 
generalized section III. Some ore has been found in 
the fault zone at the Conqueror mine, which leads 
to the inference that there are connections along 
the zone to the source of the mineral solutions, 
through which they have penetrated this far to the 
north. There may be a branch from this fault or a 
connecting fissure extending farther to the west, 
which has mineralized the area including the Sand- 
storm and Kendall properties. This system of con- 
nected faults and branching fractures is by no means 
unusual and many notable similar instances are 
found in mining camps throughout the country. It 
is not intended here to convey the idea that there 
are not other sources of mineralization for other por- 
tions of this district, or that there may not be many 
more connecting mineralized fractures extending 
from this system, which as yet remain undiscovered 
and which the future will reveal. 



July 12, 1913 



MINING AND SCIENTIFIC PRESS 



61 



The Basic-Lined Converter 



By K. P, M \tiiew8on 

•In a discussion of a paper on 'The Basic Process 
as Applied t>> Copper Smelt inn. ' by lVrvy ( '. tiil- 
chriat, read before the Society of Chemical Industry, 
Loudon, January 5, 1891,t W. C. Roberts-Austen 
asked Mr. Gilchrist whether be thought that the sub- 
stitution of a basic lining for acid lining in the 
Mauhes process would afford anything like the serv- 
ice which it had been shown to render in the metal- 
lurgy of iron. 

Claude Vautin stated that he had experimented 
for over two years with basic linings for bessemer 
converters for copper mattes at Cobar, but had given 
up the attempt on the score of cost. Mr. Gilchrist 
in his reply stated that he did not believe in apply- 
ing any system of bessemerizing to copper. 

About the time of the presentation of the paper 
mentioned, Herman Keller, superintendent of the 
Parrott smelter, in Butte, was experimenting on a 
large scale with converters lined with magnesile 
brick. He gave up the idea on account of the cost 
of linings and because no particular advantage was 
observed. My belief is that his tuyeres and convert- 
ers were too small. 

Experiments at the Great Falls Plant 

A short time afterward, similar experiments were 
tried at the Great Falls plant of the Boston & Mon- 
tana company, and' at the Old Works of the Ana- 
conda Copper Mining Co. at Anaconda. These were 
abandoned on the score of cost and the lack of ad- 
vantages. The same cause of failure, in my opinion, 
holds here. The Anaconda Copper Mining Co., how- 
ever, adopted the magnesite brick lining for its tilt- 
ing casting machines. 

E. A. C. Smith, while temporarily in charge of 
these casting machines, tried the experiment of blow- 
ing the copper in the casting machines, but the re- 
turn of the head of the department put a stop to the 
experiment, and Mr. Smith put the idea away until 
a more favorable opportunity presented itself. 

About 1903, Baggalley began his experiments of 
smelting ore in a basic-lined converter at Butte, Mon- 
tana, at the Pittsmont smelter. He was followed by 
Knudsen at the Sulitjelma plant in Norway, in 1907. 
About the year 1905 similar experiments were tried 
at several smelters, notably the plant of the United 
States Smelting Co. at Midvale, Utah. Mr. Smith, 
who was then with the Baltimore Copper Co., found 
his opportunity to experiment, and his superintend- 
ent and manager, Mr. Pierce, gave him all the help 
in his power, the result being the construction at 
Baltimore of a basic-lined converter for leady cop- 
per mattes, along the lines of the old tilting anode 
furnaces of Anaconda. The experiment gave prom- 
ising results, so that the American Smelting & Re- 
fining Co. took up the process and introduced it 
with success on leady copper mattes at its lead re- 

* Abstract from advance copy o£ paper to be presented at 
the Butte meeting of the American Institute o£ Mining 
Engineers. 

■^Journal of the Society of Chemical Industry, Vol. X, 
No. 1, pp. i to 16 (Jan. 31, 1891). 



fineries at Perth A in hoy and Omaha. Then Smith 
mid Pierce persuaded the company to try it on 
straight copper mattes at the (iarflold, Utah, plant. 

In the meantime the Anaconda Copper Mining 
Co., at the Washoe Reduction Works, Anaconda, 
lined a shell of the standard trough pattern with 
magnesite brick. The results were excellent, so they 
gradually replaced all the acid lining with mag- 
nesite brick. At Great Falls the same Company's 
experts developed a large converter along the lines 
of the upright shell, and, as this type is easier to 
build and keep in repair, it has become the stand- 
ard during the past year. Practically all the bes- 
semeri/.ing of copper mattes in the United States 
is now done in basic-lined converters. The main 
points to be observed for successful operation of 
the basic linings are : not to exceed a temperature 
of 2100°F. ; not to have tuyeres smaller than 1V4 
in. (1% in. is the preferred size) j to drive in punch 
rods the full size of the tuyere opening, immediately 
after pouring the copper; to maintain in the con- 
verter as large a mass of matte and slag as pos- 
sible to prevent sudden changes in temperature 
and overheating of the lining; to employ slag con- 
taining preferably about 25% of silica. 

A test was made with a view to finding out 
whether the cutting action of converter slag on a 
magnesia brick lining bore any relation to the silica 
content of the slag. Thirteen slags were selected 
from the daily samples sent to the laboratory. These 
varied in silica from 22.4 to 37.8%, and were care- 
fully analyzed for MgO. The results showed no 
relation between silica and magnesia content. 

To Smith and Pierce belongs the credit of taking 
a long-discarded idea and developing it into a suc- 
cessful process. The great advantages of the proc- 
ess are: decreased cost of lining; the ability to use 
large units in converting, with consequent econo- 
mies in labor, power, and repairs ; neatness and 
cleanliness of plant, abolishing the danger, from 
dust, to the health of the lining crew. 

Improvements at the Old Dominion Mine, 
Arizona 

The steel erecting gang is working on the new 
sampling mill, adjacent to the big concrete concen- 
trating ore-bins. The main work is almost complete, 
but some riveting remains to be done. The steel 
work on the crusher plant has been delayed because 
of the late arrival of the steel "building columns, 
but these are now at hand and the contractors will 
go ahead with the erection of the building immedi- 
ately. All the steel work is being done by the 
Darbyshire-Harvie Iron & Machine Co., of El Paso. 
All necessary excavation work in connection with 
the new concentrator has been completed, and 
forms are now being put in place to receive the con- 
crete. The foundations for the rolls are already in 
place. The steel work on the new concentrator will 
not be started before the crusher plant, sampling 
mill, and various conveyors are all complete. Plans 
are being made to double the present capacity of 
the custom ore-bins, which are above the A shaft, 
to give more storage room at that point. The 



62 



MINING AND SCIENTIFIC PRESS 



July 12, 1913 



timbering and lining of the pockets at the 1200 and 
800 ft. levels has been completed, and a pocket is 
being cut for the concentrating and smelting ore 
on the 1600-ft. level, the lowest level of the shaft at 
the present time. Several changes are being made 
in various stations near the shaft in connection with 
the new skip arrangements, and the tracks will be 
changed later. Ore production and development in 
the mine continues about normal. The sinking of the 
K shaft for a sump, below the 1400-ft. level, is fin- 
ished, and in a few days all timbering will be in 
place and the shaft will be ready for hoisting ore at 
any time. It is expected that the raise from the 
1200-ft. level of the Old Dominion to connect with 
the present bottom of the Gray shaft will hole 
through about July 5, and the shaft will then be 
timbered with sets down to the 1200-ft. level. A 
new slime pond has just been completed near Pinal 
creek on the old Hamm ground, and will be used 
for settling slime from the concentrator. There are 
no changes or improvements of note around the 
smelter. 



Portable Electric Mine Lamps 

By H. H. Clakk 

•Portable electric lamps should first of all be safe ; 
that is, they should not be capable of igniting gas, 
and should not be so poorly constructed that a man 
will be left in darkness due to failure of any part 
of the lamp equipment. The lamp should give the 
proper amount of light for from 10 to 12 hours on 
one charge of battery. The lamp equipment should 
be as light as possible, so that the burden of car- 
rying it and working with it may be reduced to 
a minimum. Some of these qualities are more or 
less apparent after a brief examination. There are 
other qualities that are not so easily determined, 
and I will meution just a few of them : 

A most important factor in the usefulness of 
portable electric lamps is the cost of repairs and 
upkeep ; another is the trouble that is experienced 
from interruptions of service clue to equipments get- 
ting out of order. The principal item of upkeep 
is the expense of replacing the lamp bulbs that 
have burned out. The life of the lamp is, therefore, 
an important consideration. The manufacture of 
miniature lamp bulbs does not seem to be very 
thoroughly standardized in this country. The lamp 
bulbs that the Bureau has examined have varied 
a great deal in their characteristics. These bulbs 
vary in price from 17c. to over 40c, and it may be 
supposed that the higher-priced lamps have a longer 
life, but I cannot give any definite information as 
to that, although tests are now under way to deter- 
mine this fact. The candle-power that these bulbs 
will give is not a fixed quantity, as it varies with 
the voltage at which the lamps are burned. If a 
lamp, designed for two-volt service, is burned at 
less than two volts, it gives less candle-power and 
has a longer life. If, on the other hand, it is burned 
at 2% volts, its candle-power would be increased 
and its life proportionately shortened. It is not 

•Address delivered before the Coal Mining Institute of 
America on June 18, 1913. 



always a good sign to see a lamp bulb glowing 
with extreme brilliancy, because it may mean that 
the lamp is being used at too high a voltage and 
may last but a few hours at the most. 

Battery Plates 

Another item in the cost of upkeep is the decom- 
position <fl the battery plates or elements. This is 
most noticeable in storage batteries having lead 
elements. The natural depreciation of the plates is 
hastened by overcharging, overdischarging, or charg- 
ing at too high a current. Another trouble that 
is experienced with the acid batteries is the de- 
struction of the contacts by the acid from the bat- 
tery. Even in non-spillable batteries and batteries 
using gelatin electrolites, a certain amount of acid 
often gets upon the contacts, and rapidly corrodes 
and destroys them. A good deal of this trouble 
may be eliminated by properly designing the bat- 
ter}', but it may be prevented even more completely 
by exercising care to keep the batteries clean and 
the terminals occasionally wiped off with vaseline 
or some similar substance. Storage batteries that 
make use of other electrodes than lead and other 
electrolites than sulphuric acid are not materially 
injured by overcharging or overdischarging, and do 
not have trouble with the corrosion of the contacts. 
All the batteries that the Bureau has tested, how- 
ever, have shown a more rapidly decreasing voltage 
curve than the lead batteries, which means that the 
candle-power of the lamp when the battery is first 
charged will be a good deal higher than it will be 
near the end of the discharge. 

Candle-power of Lamps 

Another point that I wish to speak of is the mat- 
ter of candle-power ratings of portable lamps. Up 
to the present time, so far as I know, no standard 
candle power rating of portable electric lamps has 
been adopted. I want to call your attention to 
the different meanings that may be given to the 
word 'candle-power' as applied to portable electric 
lamps. If a man speaks of his lamp as having five 
candle-power, he may mean the candle-power of the 
lamp bulb used in connection with its reflector. In 
either case he may refer to the candle-power meas- 
ured at one point or the average of several points. 
The true candle-power of the lamp is, of course, 
the average candle-power that it gives over its 
illuminating range. Some lamps if measured from 
a point directly in front of their reflectors, will 
show from 5 to 10 times the candle-power that they 
would have if their candle-power were measured 
from a point 30° on either side. An effect of this 
sort is, of course, to be expected, but the statement 
as to how the candle-power is measured should al- 
ways be made, because two lamps that really give 
the same amount of light have widely different 
candle-powers when measured 'head-on.' 

As an illustration : Two lamps give the same 
amount of light, but the 'head-on' candle-power of 
one is more than twelve times that of the other, 
and the average candle-power is nearly seven times 
that of the other. 

A growth of scrub willow in Alaska is usually an 
indication that the ground below is not frozen. 



July 12, 1913 



MINING AND SCIENTIFIC PRESS 



Discussion 

RHdin Of the Minis. I AMD HCtSXTinC I*HMM Hr>- ho It.-. I IO 

uh this department for the dlsousslon of technical and other 
matters pertalnlns; to mining and metallurgy. Tho Bdttor 
wtlcomH Iho espreealon of views ooolrary to hla own, bo - 
UevlBs7 that careful crltlclam la mora valuabla than casual 
compliment. Insertion of any contribution Is datermlnsd by 
Its probable Interest to the readers of this Journal. 

The Psychology of Zinc 

Tilt' Editor: 

Sir- -There was produced in the United States 
in I'M:' more than 320000 tons of metallic zinc, 
worth more than $4j.O00,000. To produce this 
amount of metal, over 100,000 little fireclay pots 
were constantly in use night and day. The aver- 
age life of these pots is only a few weeks, aud 
wheu one is broken it must be replaced As a re- 
sult, the total number consumed was between on • 
and two millions. For each of these pots in use. a 
smaller bottle-like vessel of fireclay is required ; the 
life of these smaller vessels is even shorter. The 
service required of these petty utensils is strenu- 
ous, and the handling they receive is necessarily 
rough, consequently only the best obtainable cloys 
can be used in their construction, and great tech- 
nical skill is required to make them. A rigorous 
supervision must be exercised over every stage of 
their long evolution. They must be dried out gradu- 
ally during several months, and properly heated 
afterward, before they can go into a hot furnace 
to replace those which are broken. They must be 
handled like crockery, and yet be charged and emp- 
tied once every twenty-four hours with heavy iron 
tools which only a strong man can manipulate. It 
is a triumph of manual training which makes it 
possible to use them at all. Yet it is assumed that 
they are indispensable with a resignation which may 
be truly Christian or merely fatalistic. 

The success in finding suitable clay, the care 
taken in preparing it, and all the little refinements 
in manipulation practised, and the slight changes 
in size and shape of the vessels adopted from time 
to time for economy, show to what extent the art 
of making them has been perfected. Most of the 
ore from which this zinc is smelted is mechanically 
concentrated out of material which contains less 
than 4% of zinc as it goes to the mill. From this 
material a rich concentrate containing between 50 
and 60% of zinc must be made before the smelters 
will look at it. The percentage loss in this mechan- 
ical concentration is very high. These two facts, 
the successful use of fragile vessels on a large scale, 
and the successful concentrating of lean ores, are 
taken as evidence of an advanced stage of devel- 
opment in the art of zinc smelting. This 55% con- 
centrate is. however, not yet ready to be put into 
those precious vessels ; it must be roasted to get rid 
of its sulphur. An incomplete roast will not suffice 
as in many other branches of metallurgy ; practically 
all of the sulphur must be eliminated. Here comes 
in another evidence of the success achieved in ziuc 
smelting, for the sulphur is reduced to less than 
1%, and this result is announced with pride. Still 
another evidence of acquired skill is to be found 
in the drawing and casting of the smelted metal, 
for each of the little bottles (condensers) attached 



to the pots (retort*) muit be emptied from three 
to five time* n day by scraping iU contents into 
a Indie which holds pet Imps twenty pounds. The 
metal in these ladles, after it in skimmed is poured 
into a larger ladle, from which it is poured into 
the molds, nfter proper cooling. The skill shown 
in these operations is admirable. 

There is another side to the story outlined above. 
It is a fnct that enormous deposits of mineral con- 
taining from to 20% of zinc are easily accessible, 
some of them opened by shafts and drifts, but they 
arc not available because they are not amenable to 
the high concentration possible on some leaner ores, 
or because they cannot be roasted down to less than 
1% of sulphur. These masses of rich raw material 
are a nuisance where they are found, in working 
mines for other metals, and they are doomed to be 
irrevocably lost, when these mines are shut down, 
unless happily rediscovered by posterity and util- 
ized by a new order of zinc smelters. 

It might be supposed from the foregoing outline 
that zinc is connected with some particularly troub- 
lesome associates. This is not the case. The ele- 
ments found with it are those with which every met- 
iillurgist is familiar, and has to do with every day. 
There is little foundation for the suppositions that 
zinc has properties which make its separation from 
other metals difficult, or that there is some great 
difficulty in smelting. 

Zinc has indeed two properties which impose spe- 
cial conditions on its metallurgy: the temperature 
at which it is reduced by carbon is above its boiling 
point, and consequently as reduced it exists as a 
gas, in which state it is easily oxidized. Both of 
these properties belong also to mercury, which is 
smelted from much leaner ores. On the other hand, 
zinc has properties which make its smelting veiy 
simple. Isolated by volatilization, it is easily sep- 
arated from its metallic and earthy associates, and 
it is in fact the only metal which I know of. which 
is commonly used in the arts just as it comes from 
the smelting furnace. The temperature needed to 
reduce it is moderate, that is, about the same as in 
the simplest lead-smelting process, much less than 
is required to smelt iron, copper, nickel, or alumi- 
num, or than is constantly employed in working up 
iron and steel products. 

Smelters in other branches of metallurgy show a 
willingness to discard furnaces and machinery 
known to be obsolete. They experiment to find some- 
thing better. They are willing to build furnaces 
which they know are not perfect, but will have to 
be discarded or improved later to get the best re 
suits or to meet changed conditions. Change docs 
not repel them. But zinc smelters cling to their 
precious pottery, to their petty charges, find skilled 
practices of a traditionary art, to their costly but 
perfected roastings, and they shudder at any sug- 
gestion of change. It is said zinc smelting was in- 
vented in China several hundred years ago. It has 
been also said that the zinc industry is a backward 
one ; it is rather a perfected one. I am inclined to 
think that all of its skill and most of its technical 
knowledge is to be found with its manual workers. 
At a consultation held between its family physicians 



64 



MINING AND SCIENTIFIC PRESS 



July 12. 1913 



and one or two outside specialists called in for the 
sake of appearances, mutterings very much as fol- 
lows would be heard from the several participants: 
•'One of arrested development — congenital ly defect- 
ive—unsanitary conditions — vocational disease — in- 
herited — incurable — hopeless — will live indefintely — 
no suffering — happy as a child — inherited wealth — 
sad case." The consultation will be secret, for 
everything connected with zinc is done with decor- 
ous secrecy. It will be painstaking and detailed, 
for everything connected with zinc is in perfect 
detail, and everything is done with pains. 

I think there are no zinc smelters on the Pacific 
coast of this continent, and no friends of the family 
whose feelings might be hurt by the indiscreet ad- 
missions I am making to the Press, and China is a 
long way off from there, whether one goes east or 
one goes west, and news travels slowly in the zinc 
world. These are feelings of traditional reverence 
which everyone should avoid shocking, intentionally 
or otherwise. I don't want to be thought uncharita- 
ble or unkind. There are cases which are sadder 
than death ; they should be spoken of in private, and 
with hushed voices. I hope my voice is not too loud. 
Sorrow for the stricken must find a place in every 
bosom capable of human feeling, but the inevitable 
must 1)3 faced somehow, licquiescal in pace. 

F. L. Clerc. 

Estes Park, Colorado, June 9. 

[The statement that zinc metallurgy is backward 
is frequently made. It is true that the recovery is 
less than in treatment of copper, gold, end silver, 
but we believe that this results from real difficul- 
ties and is not wholly a matter of tradition. Cer- 
tainly, the metallurgists that we know, who are 
working with zinc, are as capable and energetic as 
any. We hope to sec treatment improved. In the 
meantime our correspondent's semi-serious pen pic- 
ture will serve as a protest and stimulant. — Editor.] 



Oil-Burning in Furnaces 

The Editor: 

Sir — In my letter on 'Blast -Furnace Smelting 
with Crude Oil,' published in your issue of February 
8 last, I endeavored to emphasize the necessity of 
thoroughly consuming the oil before the entrance 
of the mixture of hot gases into the furnace. That 
such emphasis was needed is shown in a variety of 
ways. I have heard subsequently of two different 
attempts to utilize oil as fuel in cupola smelting, 
which came to naught, apparently by a neglect of 
this principle. Observation of oil-burning boiler fur- 
naces, so common now, will suffice to show the neces- 
sity of a thorough preliminary combustion. The con- 
ditions essential to complete combustion — which, by 
the way, never takes place under steam boilers — 
are these : There must be enough, but not too much 
air; the space within which the combustion takes 
place must remain at the highest possible tempera- 
ture ; the space must be ample ; and its form must 
be such that there be no interference with or be- 
tween the gaseous currents. The ideal form would 
be tubular. The best construction would be cylin- 
drical, being composed, let us say. of a sheet-iron 



tube lined with firebrick of good thickness, and 
placed horizontally. The diameter should conform 
to the amount of oil to be consumed, and its length 
should be such that the gases would be thoroughly 
burned, and that no smoke, the sign of faulty com- 
bustion, should issue from the far end. The tempera- 
ture at tne front (where the air and oil enter) will 
necessarily be less than at the back, but should be 
kept as high as possible, by cutting off the direct 
radiation of heat outwardly by means of baffle-plates. 
It is contrary to common sense to permit of open- 
ings at any point wherein the interior can be seen. 
The fire-chamber is, of course, connected to the 
furnace proper, and when thus connected to a blast- 
furnace would constitute a tuyere. Several of them 
would be provided for each furnace, spaced regu- 
larly about its periphery, and pointing radially in- 
ward, or having some inclination downward, ac- 
cording to the fancy of the designer. They must 
be contracted at the inner end, to increase the 
velocity of the entering gases and assume the cus- 
tomary effect. 

The^ application of oil-burning to the steam 
boiler is not scientifically made. The old-fashioned 
coal or wood-burning firebox is retained and made 
to do a duty to which it is not well adapted. The 
interior form of the fire-box is about the worst that 
could well be devised. Its faults for oil-burning are, 
first, its many rectangles, which produce conflicting 
gas currents and prevent the proper mixing which 
is essential to perfect combustion. Then the large 
useless space at the front, which cannot be kept hot : 
but chiefly the presence of the immense bulging 
boiler immediately over the fire at its incipiency, 
which effectually keeps down the temperature, 
which, instead of reaching 3000° or more, as it 
should, can barely surpass the red heat. I do not 
mean that all the space is at this low temperature, 
but that it does not surpass the red heat as au 
average. 

AVhen a liquid or gaseous hydrocarbon burns, the 
tendency is for the hydrogen to be consumed first, 
as the carbon, requiring a higher temperature, may 
escape combustion in part, passing off in solid par- 
ticles and making a black smoke. A cold object 
introduced into the path of the burning gases ab- 
stracts heat and produces the smoky effect. The 
bulky boiler, relatively cool, is responsible for the 
great volume of smoke and soot which often defiles 
the atmosphere in the neighborhood of steam plants. 
The remedy is obvious : it is to burn the fuel out 
of contact with the boiler, and to heat the latter by 
contact with the fully burned and very hot gases. 
Smoke is so unnecessary that it is quite a wonder 
that legislative interference has not been invoked 
effectively; a proper 'blue-sky' law should be placed 
on our statute books. 

It is in reverberatory smelting that oil-burning 
has reached its ideal phase. In that furnace the 
whole interior forms practically a great combustion 
chamber, kept at a high temperature throughout its 
entire length (exceeding in some cases 100 ft.), into 
one end of which the air and atomized oil are in- 
troduced, while the fully oxidized gases are with- 



July is, ins 

drawn from the ollu-r. Being surrounded by brick- 
work, cunningly arranged to prevent the escape of 
heat by radiation ami conduction, the whole inte- 
rior remains at a (lauding heat, the conditions being 
perfect for the development of the Maine and the 
complete combustion of the fuel. Tins condition of 
affairs should be imitated so far as practicable in 
the other applications of petroleum as fuel, even 
if it involved the construction of special combus- 
tion chambers. Such constructions arc in the way 
of being realized. Several manufacturers of oil- 
burning boilers manifest, in their catalogues at least, 
a tendency to prolong their combustion chambers 
outwardly, or by extending an arch over the inter- 
nal combustion space, which comes to the same end, 
to give the fuel a chance to develop its flame un- 
hampered by the presence of the cold boiler surface. 

Herbert Lang. 

Oakland. California. June 6. 

The Mother Lode of California 

The Editor: 

Sir — In your issue of June 21 appears an article 
on The .Mother Lode of California,' by J. H. G. 
Wolf. I consider this an ably written article on 
the Mother Lode, especially in reference to Amador 
county, and in fact all other districts mentioned in 
this article except that part of Calaveras county 
between the Mokelumne river and the Utica mine 
at Angels Camp, a distance of about 26 miles on 
the Central belt of the Mother Lode. 

Mr. Wolf intimates that the productiveness of 
the Lode is lost. He omitted to mention the Gwin 
mine, about l 1 /-: miles south of the Hardenburg, 
which property has been a producer of several mil 
lion dollars and has been worked to the 2600-ft. 
level. Other mines south along the Lode are, The 
Hamby and Quaker City, that has produced gold 
as far as it has been developed ; near San Andreas, 
the Gold Hill. Lookout, and Gottschalk mines have 
been prospected and from all indications are the 
making of paying mines, and in all probability as 
good payers as the Kennedy or any of the Amador 
properties. They are not unlike the mines of Ama- 
dor county. 

South from San Andreas, and north of Altaville. 
are other good prospects. They are, the Ford, Fel- 
lowcraft, Illinois. Rathgib, Thorpe, and others that 
have been developed for several hundred feet with 
good results. The only trouble on this part of the 
central Mother Lode is the want of capital to de- 
velop the mines to the same extent as in Amador 
county. The Lode did not break its neck at the 
Mokelumne river. In time it will be found that the 
Lode south of the Mokelumne river will prove equal- 
ly as productive as in Amador county or at Angels 
Camp. 

W. T. Robixsox. 
Mokelumne Hill, California, June 25. 

The number of productive mines in New Mexico 
in 1012 was 145, of which 26 were placers, against 
105 in 1911, of which 20 were placers, according to 
the U. S. Geological Survey. The average total re- 
coverable value per ton of ore produced decreased 



I,:. 

from #11.54 in 1911 to #6.29 in 1«J12, owing to the 
large tonnage of low-grade copper ore handled by 
the Chino Copper Co. A total of 1,352,286 short tons 
of ore from New Mexico was sold or treated in 1912. 
an increase over 1911 of 1,119,587 tons. Of thin 
total, 106,198 tons went to amalgamating and cya- 
niding mills, 1.142,002 tons went to mills for con- 
centrating only, and 104,086 tons went crude to 
■melt era. 

Analysis of Black Powder and Dynamite 

Bulletin No. 51, recently issued by the United 
States Bureau of Mines, outlines the methods of 
analysis that are used by the Bureau of Mines in 
the examination of certain classes of explosives. 
The present form of most of these methods has been 
worked out in the Bureau's explosives laboratory. 
The methods employed by C. E. Munroe have been 
taken as a basis, and were elaborated to meet the 
demands incident to the treatment of complicated 
mixtures and to the development of the explosives 
art. This bulletin presents the methods of analysis 
of 'ordinary' dynamite, and the ammonia, gelatin, 
low-freezing, and granular dynamites, and the com- 
mon grades of black gunpowder and black blasting 
powder. The bulletin is published by the Bureau 
for the information of all persons interested in ex- 
plosives and their safe and efficient use in mining 
work. It may be noted that the standard dynamite 
used at the Pittsburgh testing station is a good 
example of the 'ordinary' dynamite known in this 
country. This testing station dynamite has the fol- 
lowing composition i 

Composition of Pittsburgh Testing Station Dynamite 

Per cent. 

Nitroglycerin 40 

Sodium nitrate > 44 

Wood pulp I s 

Calcium carbonate 1 

As most permissible explosives contain only tin- 
constituents found generally in the various types of 
ordinary dynamite, the chemist will usually find it 
possible to analyze such explosives either wholly or 
partly by following the general methods of analysis 
here given for the type of explosive that seems most 
closely related to the one under examination. The 
methods of extraction with ether, with water, etc.. 
outlined in the bulletin are general methods which 
are applied with equal success to all classes of ex- 
plosives, and therefore by the use of these general 
methods, following a thorough qualitative examina- 
tion, little difficulty should be met except with those 
classes of permissible explosives that contain large 
amounts of salts holding water of crystallization, 
such as alum and magnesium sulphate, or those con- 
taining an unusual number of uncommon constitu- 
ents. Even with such explosives, however, if the 
information desired is principally in regard to the 
percentages of explosive ingredients (nitroglycerin, 
ammonium, nitrate, etc.), the methods outlined in 
this bulletin may be satisfactorily followed. 

Corporation taxes during the year ended June 30, 
1913. yielded the United States government $34,- 
948,870. 



MINING AND SCIENTIFIC PRESS 



M 



MINING AND SCIENTIFIC PRESS 



July 13, 1913 



Special Correspondence 



BOISE. IDAHO 

1 he i'lari. dl-stkict. c'uvxkmatk mlxe. lincoln. — black 

Peabl. — Whitmax. — Mistakes ix Early Wobk. — Cya- 
sidatiox Needed. 

Id many districts the rejractory nature of the ore has 
been the serious drawback to the successful development 
of mines. In some respects this is true of the Pearl dis- 
trict, though the principal drawback appears to bare been 
lack of method in determining the true nature of the ore 
and its adaptability to certain methods of treatment, pre- 
vious to the erection of milling plants. The valuable min- 
erals consist of gold and silver, intimately associated with 
pyrite. blende, galena, and small amounts of stibnite and 
chalcopyrite. In many of the veins the sulphides occur at 
the surface or within a few feet of it. Some gold occurs 
'free', but most of it is in the sulphides in the form of 
thin flakes deposited along the cleavage-planes of the 
mineral. The gangue is silicious, carrying a small amount 
of lime in the oxidized zone and some calcite both in and 




MAP OF IDAHO. 



below this zone. In general, the ore from all the prop- 
erties is similar in character, at depth, the principal dif- 
ference being in the varying quantities of blende and 
galena associated with the pyrite. The arsenical content 
varies somewhat in the different mines, and even in dif- 
ferent parts of the same mine; this factor appears to 
have had an influence on the deposition of gold. In the 
Whitman mine the arsenical ore carries the highest gold 
and silver content, while in the Checkmate mine the re- 
verse appears to be true. The reason for this apparent 
inconsistency has never been* determined. 

During the early period of mining, the Checkmate com- 
pany erected a mill, including two 5-stamp batteries, van- 
ners, and canvas tables, and this mill was operated al- 
most continuously for more than five years. The orebody 
developed consisted of three shoots of fair length and 
width, which came together at depth, forming one shoot 
nearly 600 ft. long. A portion of this orebody was of 
shipping grade, the value never falling below $75 and 
often going as high as $150 per ton. Within the orebody 
the gold and silver content was consistent and quite uni- 
form, a fact which distinguishes the Checkmate from 



other properties in the same mineralized area. A fact 
also worthy of note is the occurrence of, galena in appre- 
ciable luantitles. Invariably, where the amount of galena 
is high, the gold content is good, and this is true of all 
the mines. The ere s»nt to the mill yielded well to amal- 
gamation and produced a good grade of concentrate. Re- 
Iieated checks on heads, tailing, and the actual recovery 
in atualganj and concentrate showed an extraction of only 
62%. Undoubtedly a large part of the loss was due to 
sliming the lead sulphide. The mine was developed to the 
500-ft. level, but with the destruction of the mill by fire 
several years ago, operations ceased. Later, lessees worked 
the upper levels at a profit. The property is credited 
with a production of between $500,000 and $750,000. 

The Lincoln mine has been opened by shaft to a depth 
of 400 ft. The vein varies in width from 2 to 30 ft., and 
at the widest point was heavily mineralized. This stope 
was opened from the inclined shaft before the vertical 
shaft was sunk, and some ore was taken out. This body 
of ore was lost, however, because proper precautions were 
not taken in mining. The full width of the vein was 
mined and a kind of square-set timbering was used to hold 
the exceedingly heavy hanging wall. No filling was used. 
The vein-matter was soft and a six-foot auger hole could 
easily be made. The men were instructed to be liberal in 
the use of powder, and they were. The holes were charged 
to the collar and when blasted not only broke the ore. 
but the timbers also suffered severely, and as a result the 
hangiug wall fell, taking everything with it. The swell- 
ing ground in the drifts caused trouble, and 1200 ft. of 
the second level, from the incline shaft through which the 
first work was done, was lost and never recovered. 

The treatment of the Lincoln ore was similar to that 
of the Checkmate, in that iimalgamation and concentration 
were employed. The equipment consisted of a crusher, 
rolls, Chilean mill, plate, and Wilfley tables. Everything 
went through the Chilean mill, and as the mine, at times, 
was in condition to produce a good tonnage of ore. the 
Chilean was often crowded beyond capacity. Amalgama- 
tion followed immediately after grinding, and generally 
the stream of pulp over the plate was so thick and flow- 
ing at such speed that amalgamation was almost useless. 
An electro-amalgamation device was tried later, but the 
conditions necessary to good practice were ignored. Con- 
centration on the tables was somewhat more successful 
than amalgamation, this being due to the fact that the Wil- 
fley table is one of the most easily handled and under- 
stood of all concentrating devices. Some of the mill-ore 
was rich in free gold and at such times there could be 
observed a streak of the yellow metal traveling down the 
table above the pyrite. This helped to raise the grade of 
concentrate, but it certainly did not raise the efficiency 
in milling. The record of production is not complete, but 
the books show nearly $240,000 in shipments, of which 
$50,000 was bullion to the Boise assay office. Considering 
all the impediments to good work under which the mine 
and mill labored, the extraction would not exceed 50 per 
cent. 

The Black Pearl mine is also developed by shaft to a 
depth of 400 ft., and is equipped with a complete mill, 
consisting of a battery of eight 1250-lb. Nissen stamps. 
Dorr classifier, Abb6 tube-mill, Hendryx agitator, Kelly 
filter-press, Card concentrators, steam plant for heating 
solution, zinc precipitation, filter, and zinc press, melting 
furnace, and the usual tanks. From the standpoint of 
mechanical efficiency, the mill was up to date, but metal- 
lurgical troubles were experienced. Before these were ad- 
justed, the financial resources had been exhausted, and 
the property was closed. The final plant was not finished 
until after expensive and time-consuming experiments had 
been made on other methods of treatment, the first of 
which was the percolation process. Percolation could not 
possibly be successful with the heavy sulphide ore, owing 
to the nature of occurrence of the gold and the tendency 
of the pulp to pack when charged into tanks. 

The Whitman mine was being developed during the time 
(hat the other properties mentioned were producing, and 
should have profited by the experience of the pioneers in 



July 12, 1913 



MINING AND SCI F.N I IMC PRESS 



67 



in i : 1 1 iik The mine I* opened by an adit at a depth of 
orarly 300 ft., and for a distance of 1400 ft. on tbe vrln. 
A lluihuway typo of mill waa built and operated with 
more or lens regularity for two year*. The capacity wan 
limited, and the mine production had to be cut to con- 
form with mill capacity. Early In 1910 It wan decided to 
Inrrease the milling capacity, and the Hathaway mill wan 
consigned to the dump. Rolls, Jigs, trommels, tables, and 
vaniicrs were Installed In the former mill building, which 
hml lieen remodeled and enlarged. The equipment was 
placed In position, and In July milling operations were 
commenced. No one understood Jigs, this being the first 
Installation In the district, but finally, after considerable 
delay, a millman from the Coeur d'Alene district was se- 
cured to start the plant. The millwright had piped the 
]lg water Into the air vents of the plungers, and bad merely 
placed the screens on the frame without even one little 
nail to hold down the cloth. The re-grinding rolls were 
directly under the trommels and some 12 ft. below, and ns 
a result the product dropped, without a break, to the rolls. 
The fecd-spout from the feeder to the coarse-grinding rolls 
mado i right-angle turn and was fiat enough to keep the 
mlllmau continually poking the ore past the turn. The 
new millman found his suggestions for a few improvements, 
which would make the work easier and Increase the effi- 
ciency, taken with little grace. Also, he found it difficult 
to satisfactorily explain just why clean concentrate could 
not be made on the third screen and through the third 
hutch — the two jigs were three-compartment. The middling 
was not returned for re-grinding, but was wheeled back 
and shoveled into the boot of the elevator and returned 
to the system. More could be given, but these points are 
enough to illustrate the lack of system in the matter of 
design and erection, and particularly In the knowledge 
of the ere and its concentration. 

The mill ran several months under very unsatisfactory 
conditions and milled a fair tonnage. The grade of con- 
centrate was lowered beyond a profitable point by allow- 
ing the pyritized wall-rock to go in with the regular ore. 
In places the hanging wall was well mineralized, but the 
pyrite contained low gold and silver content. An assayer 
was employed, but his principal duties consisted in run- 
ning the crusher, as assays were made about once, and 
sometimes twice a week. Mine assays were few and far 
between, and consequently of little value in a vein where 
the difference between profitable and unprofitable ore could 
be dpterruined in no other way. A change in management 
the hitter part of the year was followed by a general 
change in the operating force, as well as in policy, all of 
which resulted in benefit to the owners. 

In 1911 the mistake of attempting cyanidation in the 
Black Pearl mill, leased for the purpose, cost the owners 
about $10,000. and resulted in shutting down the property 
and settling with the crew on a basis of 75% of their 
wages. The data, on which the cyanide plant was started, 
consisted of several laboratory experiments, and nothing 
more. In this work the ore was concentrated in tbe Whit- 
man mill and the concentrate hauled by wagon to the 
Black Pearl mill and dumped into a bin erected for the 
purpose. The equipment at the Black Pearl mill included 
a tube-mill, agitator, tanks, and zinc-boxes. The mill had 
been idle more than three years and was in bad condi- 
tion, so that considerable loss of gold solution as well 
as barren solution was unavoidable at the beginning. The 
first mill-runs did not, of course, check with laboratory 
work, so the entire plant was turned into an experimental 
mill. To conduct such an experiment and at the same 
time keep 33 or more men on the payroll is exceedingly 
costly. The owners had not objected to paying for nearly 
5000 tt. of development and the erection of the two mills, 
but this premature attempt at cyanidation was too much. 

While this did not result in. commercial success, it was 
of s.ime value in indicating what could be expected in 
the matter of treatment. A total of 598 tons of con- 
centrate was treated, the average value of which was $17 
per ton. Close concentration was not attempted in the 
Whitman mill, and for this reason the percentage of silica 
reduced the value of the material treated. The calculated 



extraction waa 7«S. amounting to 177X7, and the actual 
recovery waa $0174. which amount* acree fairly well, 
considering the loi.« (nun linkage and other causes. Pre- 
cipitation with lino shavings waa not very efficient, being 
only 8U.5«%. This low extraction waa due. In part, 
to the use of old factory-made shavings and to luck of 
definite knowledge In the use of lead acetate. The cyanide 
consumption averaged 4 lb. per ton of ore, and the lime 
S lb. The record of xlnc and lead acetate consumption 
is not complete, nor were other costs kept In shape for 
tabulation. The entire cost, Including all alterations, re- 
pairs, supplies, labor, power, etc., amounted to $6.27 per 
ton. There Is no question but that a good plant In charge 
of a competent metallurgist would reduce this cost to 
below $5 per ton, and at the same time Increase the ex- 
traction. 

The general conclusion to be drawn from observing con- 
ditions in this district Is the fact that all companies, 
aside from the Checkmate, erected mills from hurriedly 
prepared plans, seemingly under the impression that any 
mill would answer the purpose. This error seems to be 
an inherent quality in the conducting of operations among 
smaller mining companies. The building of a mill marks 
a critical point in the history of any mine. If the mine 
has been developed to the producing stage and the mill 
is not economically adapted to the ore, the final outcome 
is much the same as if a mill had been built with the 
expectation of later developing ore in the mine. The mines 
here have ore, but the general run of ore is not high 
enough in gold and silver to pay interest on capital in- 
vested in equipment necessary for concentration and ship- 
ment to smelters. Cyanidation is the logical and inevitable 
solution of this district's Drcblem, and when the demand 
for the precious metals becomes more insistent, this dis- 
trict will be a producer. 



HIGHLAND, WISCONSIN 

Zinc-Leap Production during June. — Zinc Prices. — Ircn 
Pyrite Production. — Carbonate of Zinc Ores and the 
Mineral Point Zinc Co. — Zinc Ore Opened at the 
Crawhaxl Mine. — Principal Producing Mines. — Pros- 
pects of the Districts. 

June reports at hand for the entire Wisconsin zinc-lead 
field show, shipments to local ore-separating plants and 
smelters direct consisting of 288 cars of zinc ore, equal 
to 20,850,000 lb. Of this production, the Mineral Point Zinc 
Co. secured by purchase and production under company 
management, 4140 tons; Grasselli Chemical Co., of Cleve- 
land, 2625 tons; National Separating Co., owned and oper- 
ated by the Vinegar Hill Zinc Co., 990 tons; Illinois Zinc 
Co., Peni, Illinois, 675 tons; Matthiesen & Hegeler Zinc Co., 
580 tons; Empire roasting plant at Platteville, 700 tons; 
Linden Zinc Separating Co., 450 tons; American Zinc Co., 
of Hillsboro, Illinois (new smelter), 245 tons; and the Jop- 
lin Separating Co., Galena, Illinois, 45 tons. The latter was 
purchased during the last week of the month and shows 
that the plant had resumed operation after a shut-down of 
60 days. 

The gross production of zinc from mines during the 
month totaled 18,000,000 lb„ and net to smelters of 13,345,- 
000 lb. Prices averaged from $40 to $43.50 per ton, on a 
basis of 60% zinc content. The wide latitude between high- 
grade and low-grade zinc ore in this field makes the in- 
tervening markets interesting. The average 30% grades 
of zinc ore brought $16.50 per ton; 40%, $20 to $24 per 
ton; and 50%, $26 to $30 per ton. 

Iron pyrite fell off considerably as compared with the 
output for May. The Wilkinson mine, at Benton, shipped 
1,486,600 lb. to the General Chemical Co., Hegewisch. Illi- 
nois; to Grasselli Chemical Co., East Chicago, Indiana, 
1,600,000 lb.;, the Linden shipped 500,000 lb., and the Na- 
tional Separating Co. delivered 465,000 lb„ a total of nearly 
4,000,000 pounds. 

Lead ore deliveries were made mostly to the Federal 
Lead Co., N. H. Snow, buyer, securing six out of seven 
cars sold during the month. The price remained steady at 
$52 per ton on a basis of 80% metallic lead. Considerable 



MINING AND SCIENTIFIC PRESS 



July 12, 1913 



lead ore and zinc ore are held In reserve at several points 
in the field. 

Carbonate of zinc ore, locally termed 'dry-bone,' is being 
delivered at a good rate. The Mineral Point Zinc Co. paid 
as high as $22 per ton during the last two weeks of the 
month, a price never before reached In this district. This 
Company consumes about 200 tons of 'oxide-producing' ores 
each 24 hours, and is constantly in the market for this 
material. The carbonate of zinc ores are rich in oxides, 
and for this reason the Eastern corporation has practically 
bought up everything in the two northern 'camps,' Center- 
ville and Highland. The Company now owns five mining 
plants fully equipped and will secure two more. In addi- 
tion, fee to more than 2000 acres of land has been pur- 
chased outright, and all of this is to be prospected and 
mined. Officials from the head office of the Company, in 
New York, personally inspected the new holdings in this 




Owf5 T»V«|* £7«»CTrj,- 



ana 



No 



FLOW-SHEET OF A 50-TON MILL WITH S-COMPARTMENT JIO, 
WISCONSIN. 

district during the last wceK or June, and stated that oper- 
ations will be started all over the properties. This means 
that several hundred miners will be employed in the mines 
already developed; that a great deal of new machinery will 
be installed, and that several new buildings will be erected 
at once. These developments are leading to one of the 
greatest mining booms ever experienced in the northern 
half of the Wisconsin ziucfield. 

R. W. Hunt & Co., engineers, for the Fields Mining & 
Milling Co.. recently made one of the best finds of zinc ore, 
in the Crawhall mine at Shullsburg, which has as yet been 
reported in this district. The discovery was made on the 
Thompson land adjoining the Crawhall farm, from which 
the owner has been drawing $5000 per month royalty. The 
Company has been paying monthly dividends of $28,500. 
The ore is declared by officials of the Company to exceed 
In richness and quantity the deposits proved with drill in 
the early stages of development on the Crawhall land. 

The O. P. David mine was the principal producer in the 
Montfort district. At Mifflin, the Coker, Ellsworth, Rundel, 
Peacock, and Lucky Six mines furnished the bulk of the 
ore. At Linden, Ross Bros., Glanville, Optimo No. 1 and 
2, and the Hlnkle and Welgle mines were the active pro- 
ducers. The East End mine at Plattevllle made the best 
showing; while the Klar-Piquette and Homestead mines 



both operated steadily, but stored their product in bins 
holding for better prices. At Cuba, the Burr mine pro- 
duced 4 cars, and the National Separating Co. shipped 9 
cars of roasted ores. At Benton, the Frontier, Fox, Fields. 
Indian Mound, Rowley, and Temple mines made good out- 
puts. Shullsburg witnessed a heavy production in the 
Winsklll, Rodhams, and Milwaukee-Shullsburg mines. Hazel 
Green reported its usual fine showing out of the Kennedy 
and the Cfeveland and Scrabble Creek mines. Galena re- 
ported heavy deliveries of ore from the Federal, North- 
western, Betsy, Vinegar Hill, and Indianapolis mines. 
Highland reported light shipments of carbonate of zinc 
ore, with only 4 cars. A good deal of ore is ready for de- 
livery here and at Centerville. No building is being done 
on the field, and drilling has lessened considerably since 
lower prices for zinc ore went into effect. Any improve- 
ment In the ore market will be reflected by an almost im- 
mediate increase in production. 



NEW YORK 

Copper Situation and the Nichols Refinery. — Earnings 
of Federal Mining & Smelting Co. and Butte & Supe- 
rior. — Canadian. Nickel Corporation Organized in 
London. 

A holiday on Friday in the summer reduces a New York 
business week to little more than three days. Early last 
Thursday the exodus began from the business districts, 
and on Saturday not even the department stores were 
open. This was not a matter of moment in the copper 
metal market, however, for no business had been done 
for some time before, small lots of copper changing hands 
at 14% and 14 : Vlc. per pound, and the large sellers hold- 
ing firm at 15c. without any offers. It is hoped now that 
buyers will come back into the market after the Copper 
Producers' Association report is out on Tuesday. Expons 
during June are given at 27,815 tons, as compared with 
26,457 tons during June 1912. The Nichols refinery has 
been out of the producing list ever since the beginning of 
the strike there, so that deliveries will be correspondingly 
decreased for this month. The foreign market, which has 
been chiefly responsible for the sooi statistical position of 
the metal, has struck a snag in the renewal of war in 
the Balkans, with an even better chance than before that 
the leading powers may become involved. Aron Hirsch 
& Sohn began offering September copper In London at 
lowered prices, though the cables do not give the exact 
figures. The report has been circulated that a Boston 
operator has formed a syndicate to engineer a slump in 
metal prices. The foreign statistics are good, the fort- 
nightly British report showing a decrease of 4,000.000 lb. 
in stocks. The visible supply in England, France, and 
afloat thereto was 28,142 tons on July 1, a new low level 
for recent years, and stocks at Hamburg, Bremen, and 
Rotterdam shrank to 10,054 tons. But no amount of favor- 
able statistics serves to alter the fact that consumers are 
not buying and do not seem to care what stocks are. 

The shut-down of the Nichols refinery means that about 
1,000,000 lb. per day is being kept off the market, and the 
management has at least room to congratulate itself that 
its difficulties coincide with a non-existant market, rather 
than one in which copper is in brisk demand at 16 or 
17c. per pound. Exports from the United States for the 
half year ended June 30 are given as 193,936 tons, a new 
high record which exceeds the figures for last year by 
ever 21,500 tons. 

Net earnings of the Federal M. & S. Co. for its third 
quarter, ended May 31. are given as $204,000, the earnings 
for the 9 months being $724,000, or $4000 above the sum 
required for a full year's dividends on the present 6% 
basis. Butte & Superior made earnings of over $60,000 in 
June, according to a report from Butte, where D. C. Jack- 
ling is quoted as saying that the mill recovery was slightly 
over 90% in June and that the second section will be com- 
pleted soon. Tonopah Belmont reports earnings of $481,831 
for the quarter ended May 31, and a total net income of 
$493,707. 

An important new company which has been launched In 



July 1>, l!M:i 



MINING AND SCIENTIFIC PRESS 



Montreal and London I* Hi. Canadian Nickel Corporation. 
Lid. whlrh ha* Iwued tlO.ooo.000 worth of 6% debenture 
■fork and I20.ooo.000 In common stock. The Company ha* 
acquired 17.600 acres of mining property In the Sudbury 
district, and announce* that It will mine 540,000 tons per 
year at a cost of 16.60 per ton (or mining and treatment, 
extracting an average of 30 lb. of nickel, 12 lb. of copper, 
and fl worth of precious metals per ton of ore, thus mak- 
ing a profit of |2. 678. 400 per year. This all reads very 
well, but It would be useful to know how many tons of 
ore are available and how certain are processes of treat- 
ment It has been understood that the Hyblnette process 
was to be employed, but recent reports appear to be adverse 
to the success of this process, and the International Nickel 
Co., which has so far controlled the nickel market, does 
uot show any signs of worry aa yet. 

BOSTON 

Bi'ttk A Si rr.nioB and Elm Orlu Extbalateral Rights. — 
LAtcr Copper Co. — Leachino Nevada-Douglas Ores. — 
Boston A Corbin Compact. 

The principals of the Butte & Superior and Elm Orlu 
properties in the northern part of Butte are trying to 
avoid litigation over extralateral rights. W. A. Clark has 
had Walter Harvey Weed, and the Butte & Superior 
has had J. W. Finch examining the ground, with the view 
of reaching a basis of settlement. One report stated that 
the Butte & Superior company would buy the Elm Orlu 
property, but this was denied by the former interests. 
It is believed in Boston that, while the feeling between 
the two parties may not be any too cordial, there is a dis- 
position on both sides to avoid a lawsuit. 

Thomas T. Read, associate editor of the Mining and Sci- 
entific Press, whose offices are in the Woolworlh building. 
New York, has been in Boston during the past few days 
meeting a number of people connected with the Lake 
Superior copper mines. Much interest is expressed here 
in the forthcoming visit of Mr. Read to the Lake district, 
where he will make a study of conditions. There are 
persistent rumors of a possible Lake Copper Co. and South 
Lake Mining Co. merger. Recently, on account of the 
slump in the former, the two stocks, with the regulation 
Michigan capitalization of 100, OOu shares each, have sold 
within a fourth of a point of each other. J. R. Finlay, 
three years ago, gave the Lake mine a valuation of $3 
per share, and questioned the prospect of it ever paying 
a dividend. It Is stated that a veteran mining magnate 
of Utah became so certain of the prospects of Lake when 
the stock was selling up in the eighties, that he bought 
$300,000 worth of It. One strong point in the Company's 
favor is that it still has $22 per share callable on assess- 
ments. But this is a bad time to realize on assessments. 
In the fall of 1910, a banking house here underwrote 1000 
shares at a price which netted $26,990. Yet a big fuss 
was raised about the brokers getting the stock too 
cheaply. When the Lake Copper Co. was organized 
55,000 shares went to the original holders of the land, and 
15,000 shares were sold at $3 each. Later, rights to 10,000 
shares were awarded to stockholders at $0. Then, in order 
to continue development work, 2000 shares were sold at 
$25 each. Two thousand shares were afterward sold at 
$41, and 1000 shares at $51 to $53. Four years ago con- 
ditions at the Lake mine were such that the best Boston 
authorities were willing to commit themselves incautiously 
to extravagant statements about its prospects. Less than 
a year ago the leading financial paper here, in answering 
a far Western correspondent, said: We believe that pur- 
chases of Lake Copper shares around 37 will prove to be 
profitable, provided that you have patience. The same 
paper pointed out in March 1910 that Lake had a chance 
of becoming the largest dividend-payer in Lake Superior, 
next to Calumet & Hecla. 

The neatness and dispatch with which the reorganiza- 
tion of Boston & Corbin has been effected is still the sub- 
ject of comment in Boston. Notwithstanding dullness and 
distrust, 89,250 shares were taken over in the reorganiza- 
tion, leaving the underwriters with 10,000 shares. 



VANCOUVER ISLAND 

Revival or Metal Minimi. — Ptabiikian Mink. — Tree 8 Wel- 
ti* to Rbhume Operation*. — Wmt Co am Dihtbh-th.— 
Coal Minino and Labor Situation. 

For the past several year* tho mining Indurtiy on Van- 
couver i -i. mil has been confined to coal mines. Prevlou* 
to 1908 the Tyee, Lenorn. and Richard III properties were 
In actl»e operation at Mount Sicker, and between tho 
years 1900 and the fall of 1907 these three properties had 
produced nbout $2,500,000, the ore averaging about $3 gold. 
4 or. silver per ton, and 0'/< copper. 

There arc Indications now that metalliferous mining 
will take a new lease of life on the island, and several 
of the partly developed prospects can and will be reopened 
by companies having ample capital and managed by min- 
ing engineers possessed of the experience and energy nec- 
essary. The resumption of work Is being shown by the 
operations at present going on near the head of the Great 
Central lake on the Ptarmigan mining property, which 
Is the same as lhat originally located as the Big Interior. 
When this property was opened in 1899, the facilities for 
transportation were different from what they ore now; 



MAP OF BRITISH COLUMBIA. 

in fact, a rough prospector's trail about ten miles in 
length, over which a man had to pack all his supplies 
on his back, was the only means of approach from tho 
Great Central lake, in the interior of the central portion 
of Vancouver island. From that point to AlbernI, on the 
west ceast, the means of transport were also of the crud- 
est, so that unless the ore had been of an exceptionally 
high srade, it was impossible at that time to undertake 
serious development. But today, with a good wagon-road 
connecting Great Central lake with Alberni, and an aerial 
tramway connecting the mining property with the head 
of tho lake, warrants opening this property and shipping 
the ore, even though it be low grade. 

At Alberni the shipper has choice of two routes to 
the smelter, either by water or by the Canadian Pacific 
railway. H. H. Johnson, manager for the Ptarmigan Mines, 
Ltd., of Victoria, is at present at the property, and is 
arranging for the erection of the aerial tramway that 
served the Tyee Copper Co. in transporting the ore about 
four miles from the Tyee mine to the siding of the E. & 
N. railway, which was taken down some time ago. 

It is reported on reliable authority that, on the return 
of W. J. Watson, manager of the Tyee smelter, from 
England, the plant will be blown in again in the near 
future. In fact, at the present time workmen are renew- 
ing the piling at the smelter's dock, and preparations are 




70 



MINING AND SCIENTIFIC PRESS 



July 12. 1913 



being made in a quiet way to have the plant in readiness 
for operation. It is proposed that ore from the Ptarmigan 
mine will form a nucleus for the supply to the smelter, 
and from reliable information it is figured this property 
should furnish a large tonnage of ore of medium grade 

There are on the west coast of Vancouver island, in the 
mountains adjacent to Clayoquet, Kyoquot, Nootka, and 
Quatsino sound, quite a large number of occurrences of 
copper-bearing ore discovered in 1898 and 1899, that have 
never been developed beyond the assessment-work stage, 
sufficient to 'crown grant' the properties. From several 
of these during that time I obtained samples from out- 
crops and shallow prospect holes, that carried from 5 to 
10% copper. Because of lack of capital and transporta- 
tion, high smelter rates, and the further fact that, on 
the Alberni canal, two properties which had considerable 
capital expended in development, which did not result 
satisfactorily, that portion of Vancouver island has since 
been neglected, but really presents an attractive field for 
further prospecting. 

The situation with regard to coal mining for the past 
seven months has been anything but satisfactory. In the 
first place, a strike occurred at the mines of the Canadian 
Collieries (Dunsmuir), Ltd., and about two months ago, 
when this had become practically settled, and the com- 
pany was able to mine a normal tonnage from its Cum- 
berland mine with non-union men, the United Mine Work- 
ers of America called a strike at Nanaimo in the mines 
operated by the Western Fuel Co., notwithstanding that 
the majority of the miners working for the Company were 
not members of the l T . M. W. A., arid that they were all 
working on an agreement with this Compamy which does 
not expire until next September. To a disinterested per- 
son, it appears that the main result from these labor 
troubles has been to enable the operators in the state of 
Washington to work to full capacity in order to furnish 
the markets heretofore supplied by the Vancouver island 
collieries, and, besides, to place the miners in a position 
where they draw strike pay from the union instead of 
their regular wages from the collieries. Recently mem- 
bers of the Vancouver Board of Trade tendered their good 
services in an effort to settle the differences between the 
colliery companies and the miners. This attempt was 
futile because the Canadian Collieries (Dunsmuir), Ltd.. 
was operating its Cumberland mines to the extent of min- 
ing about 2000 tons of coal per day, and, although the 
Company was not operating at the Extension mines ex- 
cept in a small way, it did not recognize the existence of 
any strike, while the Western Fuel Co. declined the serv- 
ices of the Vancouver men on the ground that the miners 
had broken their contract, and so far as the Company 
was concerned there was nothing to arbitrate. The daily- 
papers announce that the Hon. T. W. Crothers, Minister 
of Labor in the Dominion Government, is on his way to 
Vancouver island to investigate the labor conditions, and 
it is earnestly hoped that his efforts to bring employers 
and employees together and settle the present difficulties 
will be successful. There has been almost an entire ab- 
sence of the scenes and acts of violence which usually ac- 
company labor troubles. In fact, when the strike was first 
called, opinion generally expressed was against the action 
of the men. and especially with regard to breaking their 
contract, when they acknowledged they had no cause for 
complaints against the Company. Apparently it was purely 
and simply a case of a small minority who were members 
of the V. M. W. A. influencing the majority who were non- 
members by the fear of being called 'scabs.' The latest 
report is that miners are coming from England, and 
almost daily new arrivals reach the works on the Canadian 
Collieries (Dunsmuir), Ltd., and start work. The mines of 
the Western Fuel Co. at Nanaimo, Pacific Coast Coal Co. 
at South Wellington, and the Vancouver Nanaimo Coal Co. 
at the Jingle Pot colliery near Nanaimo, which includes 
all the collieries in that portion of the island except the 
Extension, are shut down, owing to the strike, while at 
I he Extension a few men are working. Whether any at- 
tempt will be made to operate there with an increased 
force is not yet known. 



KALGOORLIE. WESTERN AUSTRALIA 

Feeling as Regards the Mining Industry' — Sons of Gwa- 
lia and Great Fingali. Mines. — Frasers Group and 
Diamond-Drilling. — Bullfinch and Victorious Devel- 
opments. 

W. J. Loring. head of Bewick, Moreing & Company, 
has just visited this state afler an absence of three years. 
He was quire optimistic regarding the possibilities of gold- 
mining, and said that he could not understand why so 
many people were the reverse. He was enthusiastic re- 
garding the deep developments on the Sons of Gwalia and 
the Great Fingali Consols. At the former property he 
stated that, in addition to the $75,000 expended on new 
plant during 1912, another $50,000 would be spent during 
1913 and 1914. Wood-burning suction-gas generators had 
proved so economical at the Queen of the Hills at Meeka- 
tharra that his firm would gradually supersede steam- 
engines for driving treatment plants on all its mines. De- 
velopments at the Sons of Gwalia were highly satsifactory, 
and production and dividends could be maintained at their 
present rate for 3Vj years, while the alterations were being 
made. With regard to the Great Fingali, the equipment 
of the internal shaft at No. 13 level would be completed 
by September, when ore down to No. IS level would be 
available for the mill. The new ore-shoot at No. 17 and 
18 levels has been proved for a length of 400 ft. to be 
worth $10 to $12.50 per ton, averaging 8 ft. wide. Refer- 
ring to the volatilization process of gold saving introduced 
on the Gwalia Consols by Ben Howe, Mr. Loring was sat- 
isfied that it would solve the difficulty of treatment of re- 
fractory ore containing arsenical pyrite and antimony, 
which has been the bugbear of the Gwalia Consols. Lance- 
field, and Transvaal mines, which have not been satisfac- 
tory for several years. 

While at Southern Cross, Mr. Loring took an option on 
the Frasers group of mines, which have been practically 
at a standstill for a dozen years. On the strong recom- 
mendation of the government geologist, Harry P. Wood- 
ward, backed by the Government mining engineer, A. Mont- 
gomery, the Minister for Mines, P. Collier, offered to sub- 
sidize any local syndicate and supply a diamond-drilling 
plant and a supervisor to test the line of lode by a series 
of 10 bores to depths down to 1000 ft. This work was 
started in January, and the first bore has been completed. 
The cores from 538 to 542 ft. assayed $21 per ton. and from 
958 to 976 ft. cut a second lode which showed visible gold 
at 9G8 ft., but assays have not yet been published. Mr. 
Collier has promised Mr. Loring that if the latter can raise 
the money to sink a shaft and develop at 1000 ft., the 
Government will subsidize the venture to the extent of 
$30,000. The mines have already produced $3,625,000 from 
325,000 tons, and the deepest workings are only 366 It. 
deep, and little work has been done at that depth. There 
are three lodes in the property, but only one has so far 
been developed. The ore-shoot has yielded ore for a length 
of 4000 ft. and a width up to 20 ft. This seems to be a 
most promising venture, and may lead to this state being 
more exploited by capitalists in the future than in the past. 

Detectives have failed to find any clue to the robbers who 
stole $15,000 worth of retorted gold from the smelting-room 
of the Bullfinch mine. The carelessness of the management 
may be gauged from the fact that with nearly $75,000 of 
gold amalgam and precipitate to be treated, the three men 
held up by the robbers only earned $2.70 per day each. The 
mine io looking well, and development is being done on 
five different lodes, stoping covering a width of 15 to 60 ft. 
The plant is being increased by an additional 5 stamps and 
a tube-mill. Fred Morgan, the manager, states that he 
could easily provide ore for double the capacity of the 
mill. When the present plant is complete, 6000 tons per 
month will be treated, and a minimum profit of $50,000 
per month will be made. The winze in the Associated 
Northern-Victorious leases at Ora Banda are now down as 
follows: No. 1, to 45 ft., averaging $10.25; No. 3, to 49 ft., 
averaging $34; and No. 4. to 55 ft., averaging $33 per ton. 
At a depth of 25 to 30 ft., telluride was showing in both 
No. 3 and No. 4 winzes at the junction of the oxidized and 
sulphide zones, but did not continue. 



July 1J, i;>n 



MINING AND SCIENTIFIC PRESS 



71 



General Mining News 




JOHSAQ 

Though (he chief object of lhf> Alaska Gold Mine* Co. 
Ii lo prepare the mine for production, the work has dls- 
closed num. Interesting developments. It will be recalled 
that the Alexander level Is being continued east at on 
average depth of about 1500 ft. Crosscuts from this, 
through the orebody, which are being driven every 200 
ft., continue to show that the Company will develop from 
a point about 2000 ft. east of the cross-cut. and for a dis- 
tance of at least several hundred feet, a body of ore, 
averaging higher In grade than the estimated average 
of the mine. Even a small body of ore of such a grade 
as Indicated In these cross-cuts, that Is assaying over $3 
per ton. as against the estimated average of $1.60 for tho 
whole mine, would do mu?h to 'sweeten' the average of 
the whole. General construction work In all departments 
continues at a satisfactory rate. The cement for the dam 
Is arriving by this time; -the cement work-house above 
the dam Is practically built, and plans for the upper power- 
house are almost finished. On the Sheep creek divi- 
sion, work continues on the relocation of the railroad; 
bunk and mess-houses are practically completed; the tun- 
nel, which. It will be recalled, cuts the deposit about 700 
ft. below the Alexander level, and will be the main ex- 
traction way. keeps up Its rapid driving of over 500 ft. per 
month. 

Nome 

A new dredge of 1Vi-cu. ft. capacity close-connected 
buckeis Is being installed at the mouth of Peluk creek. • It 
Will be equipped with certain improvements adapting it for 
beach dredging, and is the second to be erected here by the 
American Dredge Building & Construction Co. Probably a 
dredge will be erected this season on Hastings creek, above 
Saunders creek, and another on Sunset creek. A new in- 
terest is being awakened In this branch of mining. 

ARIZONA 

Cochise County 
At the Calumet & Arizona smelter the total production 
for June was 4.400;000 lb. of copper, a decline of more 
than 500,000 lb. During the latter part of the month the 
old smelter plant was entirely shut down and the second 
of the new blast-furnaces blown in. Both the furnaces are 
handling about 1400 tons of ore daily. Three converters are 
in use in the new plant. The work of clearing the ground 
around the old plant, preparatory to dismantling it, has 
been started. 

GlLA COUNTY 

(Special Correspondence.) — The men employed on the 
transmission line between the Roosevelt dam and Supe- 
rior by way of Miami, consisting of about 25 white men 
and 75 Indians, are now at the head of Queen creek box 
cafion, a mile from Superior. As the concrete foundations 
for the towers are laid, a road gang makes a four-foot 
trail at a wagon grade, and slight widening of the trail 
in the future will transform it into an excellent wagon- 
road. This will fill in the gap between Iron's ranch and 
the tewn of Superior, thus placing Globe, Miami, Supe- 
rior, Florence, and all the intermediate towns and mining 
camps on a direct line of communication, besides bring- 
ing Ray and vicinity into closer relation with the Miami 
mining district. When the electric transmission line 
reaches Superior, it may be considered feasible to build 
a branch line to the Calumet & Arizona property 2V- miles 
south, whence a transmission line leads to Winkleman, 
where the power is generated. With such an arrangement, 
temporary disability at either the Government plant at 
Roosevelt, or the Ray Consolidated power-plant at Winkle- 
man, could be relieved at the other end. A recent report 
of a discovery of great richness in Powers gulch seems 
not to be borne out by subsequent investigation. Beaude- 
laire. who brought the ore to Globe, where assays showed 
1700 oz. silver and $200 gold per ton. did not claim, as 



reported, that he had uny quantity nf the ore, which wax 
it aniull picked sample. 
Miami. Juna 30. 

I'iua County 

The Calumet * Arizona Mining Co. has purrhased tho 
t'orneli.i mine, which will probably be worked by steam- 

shovels. 

Yavapai County 
At the Arkansas k Arizona mine, In the Jerome district, 
three new 160-hp. boilers and a hoist with 2000-ft. capacity 
are being Installed. The cross-cut on the 800-ft. level of 
the United Verde Is near the point where It will be cut By 
the new shaft. Good orebodlea have been opened recently 
in tho Copper Basin mine, near Prescott. This Is controlled 
by Phelps, Dodge & Co. New machinery Is being erected 
for the mill at the Y-P mines, near Senator, and stamps are 
now ready to begin work. The 800-ft. tramway from the 
dump to the plant Is nearlng completion. About 10.000 tons 
of ore accumulated from former operations will be treated. 

CALIFORNIA 

Amador County 

At the Argonaut mine, a drift from the 3900-ft. level has 
been extended 300 ft. Into rich quartz. The May clean up 
was about $50,000. The Wlldman-Mahoney property will 
probably be sold to an Eastern syndicate. 

Butte County 

The Drexler dredge is doing good work near John 
Adams, and the White ranch is to be dredged shortly. A 
shaft is being sunk to open gravel at the old Hendricks 
property at Thompson's Flat, near Oroville. A 15-hp. gas- 
oline hoist has been installed. 

Calaveras County 

Rich ore has been opened in the Tanner mine, and at- 
tention is being directed to the east side gold belt near 
Murphy's. The 60-stamp mill of the Lightner company is 
being overhauled. 

Nevada County 
F. M. Spaulding, of Los Angeles, has completed arrange- 
ments for reopening the old Richlan gravel mine on Wet 
hill. The lease of the old company has been taken over 
by the Major Gold Mining Co. A new shaft will be sunk 
to open the channel, and it is estimated that it will have 
to be sunk about 150 ft. to reach the gravel. The new 
shaft will be near the old Empire shaft on the Ragon place 
through which $300,000 was taken out. The new company 
owns about 7000 ft. along the Manzanita channel. 

Placer County 
Representatives of the Guggenheim interests have men 
at work at Poverty Bar, near Butcher ranch, to ascertain 
whether the gravel is sufficiently rich to warrant the pur- 
chase of the property. They have an option until August 
1. The company owning the property has stopped work 
on the gold dredge for the present. 

Santa Clara County 
(Special Correspondence.) — It is expected that changes 
in management of the Quicksilver Mining Co. will lead to 
a vigorous attempt to rejuvenate the famous old New Al- 
maden mines. C. A. Nones, who as president has been in 
control for several years, has been removed and W. H. 
Landers has been appointed manager. The Company has 
paid no dividends for some time, and it is now reported 
that it was kept going by sale of farm lands. A serious 
shortage in accounts is alleged against the old management. 
In the meantime, Mr. Nones has been declared bankrupt. 
Some months since, the stockholders formed an insurgent 
committee and, acting for them, a careful report upon the 
property was made by Mr. Landers, assisted by Clifford 
G. Dennis. The old miDe has been worked to a depth 
of 2400 ft. and has yielded handsomely, though of recent 
years the grade has been extremely low; roughly \ 
While extensive tracts of mineral-bearing land are owned, 
there has been little effort to develop new orebodies, and 
there is practically no ore in sight. About 4% miles 
uorth are old workings from which at one time quicksilver 
to the value of $00,000 was won, and in the ground be- 



72 



MINING AND SCIENTIFIC PRESS 



July 12, 1913 



tween them are abundant evidences of mineralization, and 
many small abandoned workings. Mr. Landers has recom- 
mended that serious efforts be made to reopen some of 
this ground. When the old workings were abandoned, 
lMiVt constituted the lower workable limit of ore, and It 
would certainly seem probable that since *»% ore has 
paid a profit for some years, it Is worth an effort to 
reopen the ground. One curloua and exasperating diffi- 
culty is the presence of carbon dioxide, but it is expected 
that means will be found for meeting this difficulty and 
the mine will again become an Important producer. 
*an Jose, July 7. 

Shasta County 

The Noble Electric Steel Co. is employing 50 men, and 
the furnace is producing 25 to 30 tons of iron per day. 
Coke Is now being used instead of charcoal. 

Sierra County 

Since the vein was cut In the North Fork mine, it has 
widened from 2 to 13 ft., and Is all payable. The drift 
will soon be under the rich shoot opened many years ago. 
At the Tightner, a shaft is to be sunk from the lower adit, 
on one of the rich ore-shoots. Active development is 
under way at the Wisconsin gravel property near Forest 
City. 

Siskiyou County 
It is stated that the Blue Ledge copper-gold property, 
near the Oregon line, has been sold to New York people. 
The Osgood quartz claims and the Nigger Boy mine, on 
Ash creek, have been acquired by Oregon and Ohio people. 
Trinity County 
The Trinity Consolidated Hydraulic Mining Co. is oper- 
ating a large force of men at both the Union Hill and 
Hupp hydraulic mines. 

Yuba County 

The Elks Gold Mining & Milling Co. has secured a two 
years' lease of the properties of the Red Ravine Mining 
Co., near Indian ranch. New machinery is to be installed 
and active work will commence early In August. 

COLORADO 

Pueblo County 
The Colorado Fuel & Iron Co. will increase its equip- 
ment of electrical apparatus by the addition of 200-kw. 
and 300-kw. rotary converters, a 50-hp. motor, three 110- 
kva. and three 150-kva. transformers, and switchboard pan- 
els and accessories. The apparatus will be furnished by 
the General Electric Company. 

Teixee County (Cripple Cbeek) 
According to local statistics, the gold production was as 
follows: 





Tons. 


A v. val. 


Gross val. 


Golden Cycle, Colorado Citv 




$20.00 


$ 680,000 


Portland, Colorado Citv 


9,950 


22.00 


218,900 


Smelters, Pueblo and Denver. . 


. . 3.850 


65.00 


250,250 


Portland. Cripple Creek 


. ,13.600 


3.00 


30,800 


Strattons Independence 


. .11.800 


2.36 


27,848 






2.59 


f 11,674 


Gavlord Dante 


. . 1,800 


3.00 


5,400 


Kavar.augh-Jo Dandy 


1,500 


2.30 


3,450 


Wild Horse 


. . 1,300 


3.20 


4,160 


Isabella 




2.00 


1,250 


Total 






$1,233,732 



El Paso company and lessees shipped 100 and 48 cars of 
ore, respectively. The Cresson mine, on Raven hill, pro- 
duced about 4000 tons. Eight sacks of ore, valued at $1000. 
were stolen from a freight car between Cripple Creek and 
Colorado Springs. Lessees at the Deadwood. Sitting Bull, 
Rising Sun, Vindicator, and W. P. H. properties are doing 
fairly well. An experimental cyanide plant is being erected 
at the Vindicator to treat dump ore. The flow of water 
from the Roosevelt tunnel is now 6735 gal. per minute. 
The recession during June was about 72 in., and water- 
level is 30 ft. below No. 11 level of the Gold Coin shaft. 
The San Juan 

Ore and concentrate shipments from Ouray during June 



were as follows: Camp Bird, 650 tons; Wanakah, 650; 
Atlas, 325; Bachelor district. 168: Jumbo. 24; Haagsma- 
Hall, 25; Revenue, Launon lease, 48; and American Nettie, 
23; making a total of 2011 tons. 

Shipments from Silverton were as follows: (1) concen- 
trate, Sunnyside, 818 tons: Iowa Tiger, 282; Vinyard & 
Co., 159: Frisco Tunnel, 232; and Gold King, 217; a total 
of 1708 tony (2) crude ore. Gold Tunnel, 125; Celtic Leas- 




l.OOKING TOWARD OURAY FROM CAMP BIRD MILL. 



ing Co.. 25: Dives. 132; So. Expl. & Mining Co., 306: Al- 
lerton, 65; Scotia, 44; Frank Hough, 40; Boston, 22; and 
Bazanella. 20; a total of 779 tons. 

IDAHO 

Blaine County 

Good ore has been opened in the Plughoff & Reed claims 
at Glendale. At one place it was cut after driving through 
40 ft. of soft ground, and shows 7 ft. of silver-lead ore. 
Sixty feet west a shaft has opened more ore of a similar 
character. The vein is well defined, and so far is continu- 
ous for 70 ft., in granite country. 

Bonner County 

Nearly 100 men are employed now by the Idaho-Conti- 
nental Mining Co. and work of preparing the ground for 
the concentrator at the mine and the power-plant, 14 miles 
beyond Porthill, is being rushed as rapidly as possible. 
Shoshone County 

(Special Correspondence.) — The worst mine cave-in ever 
experienced in the Coeur d'Alene has resulted in an al- 
most complete shut-down of the Hercules. The collapse 
of the galleries took place on June 4, closing all the work- 
ings above the No. 4 adit. An effort is being made to 
resume operations in the levels from the winze, and some 
ore is being removed. 

Operations at the mill of the Idora Hill Mining Co., on 
Sunset peak, in the Coeur d'Alene region, have begun. The 
mill is designed to handle 50 tons per day, but it is believed 
that the capacity will approach 100 tons when it is in 
full working order. The i lant. and the tramway connecting 
the mill and the mine, are operated by electricity. Ar- 
rangements are under way for the consolidation of the 
Reindeer Copper & Gold Mining Co. and the Copper Queen 



Jul) \ >, una 



MINING AND SCIENTIFIC PRESS 



73 



Mining * Milling Co. Ltd.. who** respective proper! Ir« 
adjoin. In Ihe Coeur d'Ateue. It U pro|>oaed to organlit- 
• new corporation with a capitalisation of 2,000 000 sharer, 
Spokane, Washington. July 3. 

Fred T. Greene, an enaineer for the AmulKamatrd Cop- 
per Co.. of finite, .Montana, ha* niade a report on the 
National copper mine, near Mullan. The re|>ort la aa fol- 
low*: Below preaent adit level, partly developed. 881,990 
tone, valued at $910.066 ; probable ore. 87S.400 tons, valued 
•t 92,074.898: poaalble ore, 1.830,820 tone, valued at $4,338.- 
569; total. 87,823,883. Above adit level, partly developed, 
347,890 ton*, valued at 3887.499: poaalble ore, 307.520 ton*, 
valued at 9491,833: total, 91.079.321. This make* a total 
value of 98.417,890. A contract haa been let for a 600-ft. 
ralae from the adit, and ahould be completed by the time 
the mill I* ready next February. A boarding and bunk 
hous.- of 200 men capacity Is being built. Charles McKln- 
nl* I* general manager. 

Early on July 4. somebody dynamited the flume of the 
Bunker Hill A Sullivan mill, tearing a hole 10 ft. wide on 
one aide and causing a great loss of water. After an 
hour the water was shut off at the Intake. No arrests have 
been made. The Snowstorm Mining Co. paid a dividend 
amounting to 322.500 on July 10. making a total of $1,169.- 
617 to date. 

MISSOURI 

Lawrence County 
The Grassclll Chemical Co. has awarded contracts for 
drilling 300 acres of its land near Statts City. At one time 
this property produced a good deal of ore from shallow 
depths, and now the deeper levels will be prospected. 

MONTANA 

Jefferson County 

(Special Correspondence.) — A report is to hand that 
lessees at the Ruby mine, near Basin, have shipped four 
carloads of ore valued at $120,000. This was mined by 
driving a short drift in new ground from old workings. 
This mine formerly was a good gold producer, and was 
bonded to P. H. Dowllng by W. A. Clark about six years ago. 
The former soon paid off the bond of $75,000. and recently 
lease-J the property to some Butte miners, who opened this 
rich ore. 

Basin, July 5. 

SlLVERlloW COUNTY 

(Special Corres|>ohdence. ) — The usual quarterly dividend 
of th? Tuolumne Copper Mining Co. was not declared, as 
profits were not sufficient to Justify paying out $80,000. 
The property is a small one, but is surrounded by good 
mines. At a meeting of the directors the superintendent 
stated that a rich shoot had been opened on the 2200-ft. 
level. It is S ft. wide and assays 7 to 12% copper. In the 
southeastern part of the district about 1100 acres of 
ground have been acquired by one of the leading companies 
at a cost of over $1,000,000. 

Butte, July 5. 

NEVADA 

Churchill County 
During May the Nevada Hills mill treated 4260 tons of 
ore averaging $12.45 per ton, with a residue loss of $1.50 
per ton. The total recovery was $46,403, at a cost of $28,345. 
leaving a profit of $18,057. There is $30,000 owing to the 
bank, while cash, supplies, concentrate, and absorption in 
plant are valued at $110,000. 

Elko County 

(Special Correspondence.) — At the Bluster mine, timber- 
ing heavy ground has been completed, and development is 
again under way. At a point in the vein 225 ft. south of 
the main cross-cut adit the drift was driven on what was 
supposed to be the foot-wall. It was opened at this point 
and ore averaged $30 per ton across 3 ft. About 3300 ft. of 
work has been done in the mine. At the Flaxie a drift 
from a depth of 53 ft. in the winze is out 30 ft. in good ore. 
Specimen ore has been opened in the Buckeye. Fair de- 
velopments are reported from the True Fissure and Stormy 
groups. 

Jarbidge, July 8. 



Lyon CoVIity 

(Special Correspondence.) — Reports from the superintend- 
ent of toe Nevad*-Douslaa mine continue to be encouraging. 
The 700-ft. level In the eoiith end of the Ludwlg ha* been 
drlveu for the laat 60 ft. In ore which average* about 16% 
copper, and *ome ipeclmen* of metallic copper are being 
obtained at thl* i»lnt. On the sixth level a big tonnnge of 
high-grade ore I* being «loped. and It 1* hoped to open an 
extensive orebody at thl* point. On the 100-ft. level the 
drift which Is being driven to the north beneath the wide 
gossan outcrop 1* looking favorable; the laat 20 ft. haa been 
driven through leached gossan which widens out as the 
breast advances. There Is every probability of finding n 
good-sized body of ore of a secondary nature below. A small 
force of men has been put to work In the Casting Copper 
udlt, and shipments from there will be resumed. The pro- 
posal to build a smelter for the Nevada-Douglas has been 
definitely abandoned, as the experiments with leaching 




MAP OF NEVADA. 



made by the stafT have resulted so favorably that W. L. 
Austin was engaged to study the problem, as well as similar 
work elsewhere. Mr. Austin has reported thai while me- 
chanical difficulties are being experienced in leaching work 
at the Bullwhacker and Butte-Duluth, there is every prob- 
ability that they will be successfully overcome and that 
leaching by means of sulphuric acid can be done on these 
ores at a cost not to exceed 10c. per pound. The ore, crushed 
to 16 mesh, will be leached with a 12% solution of sulphuric 
pcid, giving a 90% extraction, the copper being precipitated 
lrom the solution by electrolysis. It is the intention of 
the management to proceed with the construction of a 
leaching plant, and the ore In the Douglas Hill group will 
be treated in this way. 
Mason. July 3. 

Duiing the week ended June 2, the Mason Valley smelter 
treated 4422 tons of ore, and shipped seven cars of matte. 
The Oakland Copper Bell has opened 5 ft. of ore. Ore on 
the dump averages 7% copper, 5 oz. silver, and $2.50 gold 
per ton. At the Yerington mountain, the shaft to connect. 
No. 3 and 4 adits is down 600 ft. Regular shipments are 
made to the smelter. A gasoline hoist has been installed 
at the Blue Jay. 



74 



MINING AND SCIENTIFIC PRESS 



July !•_>. 101:5 



Nye County 

The Tonopah Miner, which is now in Its twelfth year of 
publication and has always been optimistic about Tonopah 
mines, states that the gross production of the district for 
the first half of 1913 was $1,210,889. During the week ended 
July 5 the output of eight mines was 11,715 tons valued at 
$259,345. On the 750 ft. level of the new shaft the Tonopah 
Extension has opened a new, vein in the north cross-cut. 
So far it is of a low-grade character. The south cross-cut 
on the Montana-Tonopah 55-ft. level went through 12 ft. 
of quartz, showing good ore in places, and is thought to be 
a faulted portion of the south vein. The Halifax 1000-ft. 
level has cut some rich veins of sulphide ore. On the 1166- 
ft. level of the Belmont, the north cross-cut opened the 
western extension of the shaft vein 375 ft. west of the other 
shoot being developed on this level. 

At Manhattan the Big Four is producing about 100 tons 
per day, but this will be increased when the conveyor is 
installed to handle the reject from a trommel working be- 
low the crusher. This will act as a sorting station and 
prevent waste going to the stamp-mill. The lessees at the 
White Caps are still shipping high-grade ore to Tonopah. 
The Earl claim of the Brady leases is improving on the 
350-ft. level. 

Storey County 
Tt is probable that a 50-lon plant consisting of Kinkead 
crushers, amalgamating plates, and concentrating tables 
will be erected on Cedar Hill to treat ore from the Sierra 
Nevada property. Walter Techow, of the Kinkead Milling 
Co. and Ophir cyanide plant, will be in charge. 

White Pine County 
One round of shots in the Morris and Bunker Hill mines 
of the Giroux company, at Ely, is said to have broken down 
30,000 tens of ore. As a result the operating force was re- 
duced by laying off about 125 men. Until now, it is stated 
that while the mines have been producing 1000 to 1200 tons 
of ore per day, much of it has been taken out in further 
developing the ore deposit. Now the development has 
reached the stage where the best features of the caving 
system can be followed and cost of mining will be greatly 
reduced. 

NEW MEXICO 

The output of cpal in New Mexico in 1912 was the larg- 
est ever made, according to the U. S. Geological Survey. 
The production increased from 3,148.158 short tons in 1911, 
valued at $4,525,925, to 3,536,824 tons in 1912, valued at 
$5,037,051, a gain of 12.3% in quantity and of 11.3% in 
value. In the Raton field, 11 mines produced over 100,000 
tons each, two producing over 400,000 tons. The San Juan 
River field, In the northwest, has an area of 13,000 square 
miles. 

Grant County 

The Chino Copper Co. recently made an experimental 
shot in one of its open-cut mines at Santa Rita and the 
result was, it is said, entirely satisfactory. Three adits, 
some 10 or 15 ft. apart, were driven into the mine a dis- 
tance of 45 ft., each connected at the ends by a drift about 
50 ft. long. In this drift, near the end of each adit, 53,000 
lb. of high-grade powder was packed. The blast was fired 
by electricity. This method cost between $7000 and $8000. 
but is expected to simplify mining there, where 90% of 
the ore can be moved by steam-shovel work. 

OREGON 

Jackson County 

(Special Correspondence.) — A 20-ton mill is being erected 
at the Nellie Wright mine, in the Gold Hill district. It 
will be driven by electric power. The ore is worth from 
$9 to $18 per ton. The Blossom mine, in the same district, 
is opening well. The Cinnabar has been opened by two 
adits, driven to depths of 320 and 180 ft, respectively. 
Drifts from these have opened a large orebody, assaying 
high in mercury. The property is being examined by two 
englneeis. After an idleness of 30 years the old Alice mine, 
on Kanes creek, is being reworked. 

Philomath, July 4. 



UTAH 

Beaver County 
The Majestic Mines Co. owns, near Milford, 25 claims con- 
taining copper and silver-lead ores. Monthly profits range 
from $3000 to $5700. The deepest shaft is down 600 ft., 
and has opened silver-lead ore 100 ft. below water-level. 
The shoot copper ore in the Old Hickory is fairly ex- 
tensive and contains about 75,000 tons. Shipments total 
75 tons per day. 

Juab County 

For several months the Tintic Standard 1000-ft. level 
has been driven on a contact between quartz and lime, 
which was of an encouraging nature. Ore was cut, but 
gas drove the men out. The ore was rich in lead and 
silver. Similar ore has also been opened in a drift from 
a winze below the 1350 ft. level of the Eagle & Blue Bell 
mine. Work is to be resumed at the United Tintic. as the 
last assessment has been paid off the Company's debt, leav- 
ing a surplus for further work. 

Salt Lake County 
During the half-year ended June 30, 1913, the Salt Lake 
Stock Exchange dealt with 3,499,979 shares, representing 
a value of $833,763. These included 62 listed and 22 un- 
listed stocks. 

High-grade silver-lead ore has been opened in the Gra- 
ham lease of the West Toledo mine at Alta. A cave had 
been driven into 175 ft. from the mouth of an adit, and 
six inches of ore was exposed, which is figured to be an 
extension of the Toledo vein. 

The Utah Consolidated Mining Co. has paid a dividend 
of 5Pc. per share, amounting to $150,000. The mine is 
opening well, and several new shoots of copper have been 
discovered. One Is in the porphyry dike which divides a 
portion of the Highland Boy limestone. It is small but 
parts carry 10 to 157c copper. On No. 12 level, 2.4 to 3.i% 
copper ore is being mined. This mine is the largest lead 
producer in Utab. and lead ore shipments average 250 tons 
per day. The shoots, especially in Yampa limestone, are 
showing well. 

Summit County 

The Silver King Coalition Mines Co.. Park City, will 
place in operation in its mines new 2%-ton and 3-ton 
electric locomotives and a 35-kw. motor-generator set or- 
dered from the General Electric Co. The report of Frank 
Anderson, engineer conducting surveys for the Silver King 
Consolidated through the Silvei King Coalition's workings, 
to ascertain if the latter Company has trespassed on the 
former property, has been returned to the federal district 
court. The engineer says that, to the best of his knowl- 
edge, the Coalition's workings do not enter the Consoli- 
dated's ground. This report is believed to be the endins 
of the present $750,000 trespass suit. The Consolidated 
officials say that they will go further down into their own 
ground and try to discover if there is evidence of tres- 
pass there. This work will take many months, as about 
1800 ft. will have to be driven. 

During the first half of 1913, the Park City district 
porduced 41,095 tons of ore valued at $1,643,800. Eight 
roasting furnaces are working at the Ontario mill, and 
150 to 160 tons are being treated daily. 

WASHINGTON 

Stevens County 
The president of the Chewelah Copper King Co., S. P. 
Domer, has denied that the mine has been sold for $350,000, 
but stated that negotiations are under way with the 
Granby company, of British Columbia. A recent shipment 
of ore to the Grand Forks smelter returned 8.659c copper 
and 41.6 oz. silver per ton. Electric power for the mine 
and mill of the United Copper Co.. near Chewelah, will 
be available in about two weeks. At present. 100 men 
are employed. The adit being driven to cut the vein at 
a depth of 1000 ft., at a distance of one mile, is being 
pushed forward steadily. It is in 2500 ft., and ISO It. 
was driven in June. The shaft is down 600 ft. An engi- 
neer for the Gnggenheims has been examining the prop- 
erty. 



July 1_\ is»i;i 



MINING AND SCIENTIFIC PRESS 



MEXICO 

r.uiu ii \ 

(Sprrlal Corre»nondr ive. ) — Tho condlllon of the north 
eastern states of Mexico, mim-lally Coahulla. Tnmnullpns. 
mid Nucva Leon, U M bad a* could be. The federal troops 
are onlv holding the large towns nnd are trylnic to keep 
open n part of the railroads, meeting with Indifferent sin 
• ■ ■ A large p> n t iitaKe of the iiopulatlon of these states, 
espeelnll> the middle nnd lower classes, la against the pres- 
ent government of Mexico. Mining Is almost at a stand 
still. The Maxapll Copper Co., operating the Coahulla «i 
Zacatecas railway from Salllllo to Conception del Oro, In 
the state of lacatecns. has been shut down since May 1. 
This Includes mines, two smelters, and railway, throwliiK 
out of employment between 3000 and 4000 men. Conditions 
are steadily growing worse. 

Salllllo. June 17. 

So NORA 

Mine shipments from Sonora during June came well up 
to the average, there being more than K.000, 000' worth of 
ore shipped Into Arizona and Texas from various proper- 
ties. As shown by the statement of the collector of cus- 
toms at Agua Prleta, the June shipments were: Nacozarl, 
10.560 tons: Churunlbabi, 1622; Ell Tlgre, 92; Panama, 41; 
San Ygnaclo. 21; Vaquero, 41: Sonora, 47; El Temblor, 22; 
and Alice. 27: making a total of 12,373 tons. El Tlgre 
shipped 71 bars of bullion. Estimated values are as fol- 
lows: Gold. t»295.800; silver. ^587,300; and copper, F1.168,- 
900; a total of t*2,052.000. 

The wet and dry mills of the Calumet & Sonora mine 
are working two shifts. Ore is mined on the 400 and 500- 
ft. levels. The new crusher and sorting belt are working 
well. About 160 men are employed. 

PERU 

tSpeclal Correspondence.) — Ferrobamba is shut down for 
the present. In the Department of Arequipa, many mining 
properties are of doubtful value, and difficulties In trans- 
port, labor, and laws are against good work. As far as 
the southern portion of Peru is concerned, a promising 
enterprise is the Investigation of the great belt of Silu- 
rian slates, which extend from the west side of the main 
Andean range, to the north and east, in the direction of 
the Inambarr! and Paucartambo rivers, where there are 
gold deposits of a good character. 

Casilla, Arequipa, June 14. 

The Borax Consolidated, Ltd., of London, England, has 
petitioned the Peruvian government for certain concessions 
in the Republic, in return for which the Company agrees 
to do the following: (1) Construct a railroad or aerial 
tramway from the borax and salt mines in the province 
of Moquegua. department of Arequipa, to the city of Are- 
quipa; (2) install near the city or mines a plant to pro- 
duce 40,000 tons of borax and over, as the demand in- 
creases; (3) transport from the mines to Arequipa 1200 
tons of salt annually, and return with supplies for the 
employees of the Compania Salinera del Peru; (4) erect 
telephone lines to the mines; (5) employ only Peruvians 
at their works; and (6) will spend £200,000 on the con- 
cession on these works. In return for these proposals, the 
Company asks that no export duty be placed on borax from 
the port of Mollendo for 18 years after work commences, 
all equipment to be imported duty free, and that the 
towns near the concession will not tax borax production 
for 18 years. 



Schools and Societies 



A number of students from the Kansas School of 
Mines and Metallurgy, accompanied by B. L. Wolfe, E. C. 
O'Keefe, and A. W. Young, inspected the mines, smelters, 
and mills in the mining district around Joplin, Missouri, 
and in southeastern Kansas during the first week in July. 



The Colorado School of Mines summer classes open on 
July 14 and will finish on August 23. There will be four 



Instructors, and subjects Include seven grades of matin- 
niatlcs, civil nnd mechanical engineering, rhemlstrf, and 
metallurgy. KVi h range from ft to $16 per subject. It Is 
pioim-.nl diirhiK tin' milling fall to have a short course 
In coalmining. 



Personal 



Professional men arc Invited to send news of it onuses- 

menu and travels Such news la Interesting- to friends. 



Walter Oiu:.m Is In New York. 
James O. Bkrryhili. was In New York recently. 
S:i riiKN Hiu. ii is hi the M Idas property near Valde/. 
Grant H. Ton is on his way to Seattle from Alaska. 

A. K. McDaniki. Is making examinations In Alaska. 

B. B. Thayer will leave New York for Butte on July 15. 
F. \V. Bradley left Juneau for San Francisco on July 10. 
H. F. Fay has returned to Boston from the Lake Superior 

district. 

H. Robinson Plate Is making a professional visit to 
Juneau. 

Levi Hoi.iihook is ill with pneumonia at Cambridge. 
Massachusetts. 

F. G. Clapp sailed for Europe on June 24 for professional 
work in Hungary. 

Kiriiy Thomas has returned from a professional visit to 
the Cobalt district. 

John A. Thomson will leave Saltillo, Coahuila, Mexico, 
by way of Tampico, for the United States. 

John Bagley has been appointed by Governor Lister 
inspector of mines for the state of Washington. 

E. J. Vallentine Is on a six months vacation and expects 
to arrive in San Francisco on July 21, on his way from 
the Malay States to England. 

C. H. Fulton and J. Burns Read, of the Case School of 
Applied Science, who have been visiting the West, were In 
San Francisco last Monday. 

H. H. Armstead, president of the Mexican United Co., 
has gone to Mexico to make an inspection of the Company's 
properties in Guanajuato, Jalisco, and Tepic. 

C. M. Eye has been appointed superintendent of the 
American Girl mine, at Ogilby, California. Until further 
notice his professional address will continue to be at 
Ocean Park. 

H. C. Ray, assistant professor of metallurgy at the Uni- 
versity of Pittsburgh, Pennsylvania, is with the Butte & 
Superior Copper Co. of Butte, Montana, for the summer, 
in the experimental department. 

J. B. Lippincott announces the opening of engineering 
offices in the Central building of Los Angeles. With Mr. 
Lippincott will be associated Edward R. Bowen, who will 
specialize in steel and concrete structures. 

E. T. Cork ill, chief inspector of mines for Ontario, has 
resigned his position to accept an appointment as safety 
engineer with the Canadian Copper Co., at Copper Cliff, 
Ontario. He is succeeded by T. F. Sutherland, assistant 
inspector of mines. 



Obituary 



Robert Pettiorew, one of the best known mining men In 
the state of Washington, died at his home at Roslyn on 
July 8. . 

JonN A. Kirby, one of the pioneer mining men of Utah 
and Nevada, died at Providence, Rhode Island, recently. 
.Mr. Kirby was one of the best known mining engineers of 
the West, having been superintendent of the old Bullion- 
Beck mine at Eureka, Utah; also of the Daly West mine 
at Park City and of the Montana-Tonopah at Tonopah. He 
was one of the original owners of the Nevada Hills prop- 
erty and was one of the directors of this Company at the 
time of his death. 



76 



MINING AND SCIENTIFIC PRESS 



July 12, 1913 



The Metal Markets 

LOCAL METAL PRICES 

San Francisco. July 10. 



Antimony „ 12— 12|c 

Electrolytic Copper M 16— 16Jc 

Pig Lead 4.60— 5.56c 



Quicksilver (flask) Ml 

Tin. 60— 61)e 

Spelter 7— 7}c 



Zinc dust. 14001b. casks, per 100 lb., small lots 89.50— 9.75; large 87.50— 8.60 



EASTERN METAL MARKET. 
(By wire from New York.) 
NEW YORK, July 10. — Copper Is weak and In little de- 
mand. Sales reported are of little Importance. The greatly 
decreased stock reported by the Copper Producers' has had 
no Immediate effect upon market conditions. Lead remains 
unchanged and but little business Is being transacted. 
Spelter continues dull with no change In the market. On 
July 9, cables from London report copper as easy with spot 
at £62 10s. and futures £62 15s. Lead Is quoted at £15 7s. 6d. 
and spelter at £20 7s. 6d. The tin market Is easy with spot 
at £177 5s. and futures £178 5s. 



SILVER 

Below are given the average New 
cents per ounce, of fine silver. 
Date. 

July 3 58.25 

4 Holiday 

5 58.25 

" 6 Sunday 

* 7 58.60 

" 8 68.12 

9 68.37 

Monthly averages. 



May 
June 



July 



York quotations, In 

Average week ending 

28 60.08 

4 59.99 

11 ,...69.75 

18 69.08 

26 68.12 

2 68.20 

9 58.29 



1912. 

Jan 56.25 

Feb 69.06 

Mch 58.37 

Apr 69.30 

May 60.88 

June 61.29 



1913. I 1912. 

63.01 ! July 60.67 

61.25 Aug 61.32 

57.87 Sept. 62.95 

59.26 I Oct. 63.16 

60.21 Nov 62.73 

69.03 Dec 63.38 



Lead Is quoted in cents per pound or dollars per hundred 
pounds. New York delivery. 



July 



Holiday 
Holiday 



.4.33 



July 



4.88 

4.83 

4.33 

Monthly averages. 



Average week ending 



May 
June 



.4.33 
.4.33 
.4.33 
.4.33 
.4.33 
.4.33 
.4.33 





1912. 


1913. 






4.43 


4.2S 


July 


Feb. 


4.03 


4.33 


Aug. 


Mch. 


4.07 


4.32 


Sept. 




4.20 


4.36 


Oct. 






4.34 


Nov. 




4.40 


4.33 


Dec. 



1912. 

. 4.71 

. 4.64 

. 5.00 

. 5.08 

. 4.91 

. 4.20 



ZINC 

as spelter, standard Western brands. 



July 



Zinc is quoted 
Louis delivery, In cents per pound. 
Date. 

5.10 

Holiday 

5.10 

Sunday 

5.10 

5.10 

5.10 

Monthly averages 



St. 



Average week ending 

May 28 5.19 

4 6.11 

11 4.94 

18 4.90 

26 4.97 

2 5.07 

9 5.10 



June 



July 



Jan. 
Feb. 
Mch. 
Apr. 
May 
June 



1912. 

. 6.42 

. 6.50 

. 6.57 

. 6.63 

. 6.68 

. 6.88 



1913. 
6.88 
6.13 
5.94 
6.62 
5.23 
6.00 



/uly 
Aug. 
Sept. 
Oct. 
Nov. 
Dec. 



1912. 

. 7.12 

. 6.96 

. 7.46 

. 7.36 

. 7.23 

. 7.09 



O.VICKSILVER 



The primary market for quicksilver is San Francisco. Cali- 
fornia, being the largest producer. The price Is died in the 
open market, and, as quoted weekly In this column. Is that 
at which moderate quantities are sold. Buyers by the car- 
load can usually obtain a slight reduction, and those want- 
ing; but a flask or two must expect to pay a slightly higher 
price. Average weekly and monthly quotations, in dollars 
per flask of 75 lb., are given below: 



Juna 



Week ending 



1912. 

Jan 43.75 

Feb 46.00 

Mch 4 6.00 

Apr ^ .42.25 

May 41.76 

June 41.30 



I June 26 

41 July 3 

41 I » " 10 

Monthly averages. 

1913. | 1912. 

39.37 , July 43.00 

41.00 Aug 42.60 

40.20 Sept 42.12 

41.00 Oct. 41.60 

40.25 Nov 41.50 

41.00 Dec 39.75 



.41 

.41 

.41 



COPPER 



Quotations on copper as published In this column rep- 
resent average wholesale transactions on the New York 
market and refer to electrolytic copper. Lake copper com- 
mands normally from 1-5 to l-4c. per lb. more. Prices are 
In cents per pound. 



Date. 
July 



3 14.35 

4 Holiday 

5 14.23 

6 Sunday 

7.'. 14.23 

8 14.23 

9 14.23 



Average week ending 

May 28 15.43 

June 4 15.18 

11 14.79 

18 14.70 

26 14.47 

July 2 14.43 

9 ,.14.25 

Monthly averages. 



1912. 1913. 

Jan 14.09 16.54 

Feb 14.08 14.93 

Mch 14.68 14.72 

Apr 15.74 15.22 

May 16.03 15.42 

June 17.23 14.71 



1912. 

July 17.19 

Aug. 17.49 

Sept 17.66 

Oct 17.82 

Nov 17.31 

Dec 17.37 



1913. 



COPPEB SURPLUS 

Figures showing the visible supply of copper at the be- 
ginning of each month are now widely available. Below 
are given the amounts, In pounds, known to be available at 
the first of each of certain months. The figures are those 
of the Copper Producers' Association supplemented by Mer- 
ton's figures of foreign surplus. 

U. S. European. 

July 1912 44,336,004 107,817,920 

August " 50,281.280 113,285,760 

September " 46.701,376 112,743,680 

October " 63.065,587 107,396,800 

November " 76,744,967 103.803.840 

December " 86,164.059 96.949.440 

January 1913 106,311,360 96,859,840 

February " 123.198,362 100.067,520 

March " 122.302,198 95,642.720 

April " 164.269.270 106.565,760 

May " 76.549.108 102,654,720 

June " 67.474,225 93,378,880 

July " 52.904.606 85.565,760 

United States Production and Consumption 
Domestic 

Production. deliveries. Exports. 

May 1912 126,737.836 72.702.237 69.486,945 

June " 122.315,240 66.146,229 61,449,650 

July " 137,161.920 71.093.120 60.121,600 

August " 145.628,621 78,722.418 70.485.160 

September " 140,089.819 63.460,810 60.264.796 

October " 145.405.453 84,104,734 47.621,342 

November " 134.695.440 69.369.795 55,906.550 

December " 143,353.280 68.490.880 65.712.640 

January 1913 143.479,625 65,210.030 60.383,845 

February " 130.948.881 59.676,402 72.168,623 

March " 136,251,849 76,586,471 77.699,306 

April " 136,333.402 78.158.837 85.894,727 

May " 141.319.416 81.158.800 68.286.007 

June " 121.860,853 68,452.572 68.067,901 

The fortnightly statistics of copper show that the Euro- 
pean stocks, including Hamburg and Rotterdam, on June 
30 decreased 1727 tons, while copper supplies afloat de- 
creased 50 tons, making a total decrease In the visible sup- 
ply of 1777 tons to 38.199 tons, as compared with 39.976 tons 
on June 14 last. 



TIN 

New York prices control In the American market for tin. 
since the metal Is almost entirely Imported. San Francisco 
quotations average about 5c. per lb. higher. Below are given 
average monthly New York quotations, In cents per pound: 
Monthly averages. 



1913. 1913. 

Jan 42.53 60.45 

Feb 42.96 49.07 

Mch 42.58 46.95 

Apr 48.92 49.00 

May 4 6.05 49.10 

June 45.76 45.10 



1912. 

July 44.25 

Aug 46.80 

Sept 48.64 

Oct. 50.01 

Nov 49.92 

Dec 49.80 



1913. 



July 1J. 



MINING AND SCIENTIFIC PRESS 



77 



The Stock Markets 

>l\ urn I \ Ml III. Mis. 

(Ban Francisco Stock and Bond Exchange.) 
in in I i.i 



Closing pries*. 


• -ini; price*. 


Uslsd. 


July ■. 


Unlisted. 


Jul; ». 


Associated <>u is. 


m 


N ilorau i >. v s*^ M| - 


M 


K. 1. du Pont «)•._ _. 


m 


Purine Purl. Cement 6a 


W 




to 




T7 


Unlisted. 






»H 


Associated oil in rar 


to 




SO 


General Petroleum as 


at 




TO 


STOCKa 



flualng ill—-. 

Listed. July ft. 

Associated Oil SI) 

Amalgamated OU 

K- 1, du Pont Powder pfd 

Pacific Coast Borax, pfd SO) 

do com .„ — 

Paciric Crude OIL. 35c 

Sterling O. at D_. .... 1.06 

Union OH of Cal Tg) 

Weal t'oaal oil. pfd_ K> 



Closing prlcea, 
UnlUted. July V. 

Mascot Copper It 

Noble electric Steel 3 

Natomaa Consolidated 

Paclnc Coaat Uorax, old. 

I'ncJ P. c Portland Cement 50 

Klveralde Cement 46 

Standard Cement 17 

Standard 00 of Cal 

Santa Crux Cement 87) 



NEVADA STOCKS 
(By courtesy of San Francisco Stock Exchange.) 
San Francisco, July 10. 



Atlanta „ „ 1 .16 

Belmont. 6JJ7 

Big Four. 40 

Buckhorn . 1.30 

Con. Virginia 10 

Florence M 

QoldfleldCon 1.70 

Qoldfleld Oro 11 

Halifax 1.40 

Jim Butler 68 

Jumbo Extension 11 

MacNamara 17 

Mexican. 72 

Midway „ 41 



Mlzpah Extension 9 .46 

Montana- Tonopah 1.02 

Nevada HUla 92 

North Star 96 

Ophlr 16 

Pittsburg Silver Peak 46 

Round Mountain 48 

Sierra Nevada 14 

Tonopah Extension 2.30 

Tonopah Merger 68 

Tonopah of Nevada 4.80 

Union 08 

West End 1.26 

Yellow Jacket. 26 



COPPER SHARES — BOSTON 
(By courtesy of J. C. Wilson, Mills Building.) 



July 10. 
Bid ABk 



Adventure $ 1) 

Allouex 31) 

Calumet & Arizona... 69| 

Calumet A Hecla 415 

Centennial 11 

Copper Range 39 

East Butte 10 

Franklin 6 

Granby 61) 

Greene CanftneA , „ 5] 

Hancock 16 

Iale-Royale 18) 

Mass Copper 2) 



1| 

32 
60 
420 
12 
39) 
10) 

5) 
Ml 

6i 
16 
19 

3 



July 10. 
Bid Ask 



Mohawk. 8 42 

North Butte 24) 

Old Dominion 43) 

OBceola 74) 

Qulncy 56) 

Shannon 6 

Superior & Boston 2| 

Tamarack. 28) 

U. S. Smelting 36 

Utah Con 9 

Victoria 1 

Winona _ 1) 

Wolverine 41 



24) 
44) 

76 

68 
6) 
21 

29 

35) 
9) 



NEW YORK ftUOTATIONS 

(By courtesy of E. F. Hutton & Co., Kohl Building.) 
July 10. 





Bid. 


Ask. 




Bid. 


Ask. 


Alaska Mexican. 


8% 


914 


Mason Valley. . 


• 514 


6 


Alaska Tread. . . 


37 


39 


McKinley-Dar. 


. 1% 


iy» 


Alaska United.. 


17% 


189» 




.163 


170 


Alaska G. M. . . . 


17 


1714 


Mines Co. Am. 


. 294 


294 


Braden Copper.. 


614 


6% 




. 894 


8% 


B. C. Copper 


2V4 


294 


Ohio Copper... 


94 


% 


Davis-Daly 


1% 


214 




. 18 


20 




2 


4 




. 2 


4 


El Rayo 


1 


2 


S. W. Miami. . . 


. 5 


7 


Ely Con 


8 


10 




14 


54 

171 

14 


First Nat 


1% 
194 


1% 
114 


S. O. Calif 


169 




Trl Bullion . . . 


14 


Green Can 


5% 


6 




1 


114 




16 


17 


United Copper. 




14 




314 
254 


3% 
214 


Wettlaufer 


12 


14 
214 




Yukon Gold... 


. 214 



TIN STATISTICS 

Statistics cabled from Europe show decreased visible sup- 
plies ranging from 1600 to 1800 tons, according to L. Vogel- 
stein & Co.'s report of July 1. The New York Metal Ex- 
change makes the decrease 2609 tons. The difference is 
due largely to the exclusion of Europe (other than Hol- 
land) from the Exchange figures, all tin going there (which 
in June amounted to 985 tons) being left out of considera- 
tion by the Exchange. It deducts shipments to the Conti- 



nent from the total shipments, (nil the effect It tantamount 
to enlarging deliveries correspondingly. The net mull of 
the Exchange figures should bannonlie cloaely with for- 
eign ttallttlca, for the former thowi supplies, exclusive of 
sir. in-, (hlpmentt to the Continent, of 4855 tons, and de- 
liveries of 6782 tons, an apparent decrease of 1927 ton* In 
the visible. Instead of 2609 tont. 

From whatever point of view considered, however, the 
position Is not unfavorable. Doubtless tho market would 
have made a better response were It not for many present 
uncertainties and the rather dubious future. To date, 
Straits' shipments arc 2000 tons In excess of last year, and 
those for July are expected to Increase this about 1000 tons. 
Also, while the falling off In American deliveries at tho 
end of June amounted to only 550 tonB compared with last 
year, the decrease at the end of July will amount to about 
1500 tons, by which time also the decrease In Europe, now 
734 tons, will amount to fully 1000 tons. These Increased 
shipments on the one hand, and decreased deliveries on 
the other, are having a demoralizing effect, but, price and 
position considered, much that was unsound in the situ- 
ation has undoubtedly been discounted. 

On June 30 the visible supply was 11.101 tons, having a 
spot value in London and New York of £193 15s. per ton 
and 42.625c. per lb., respectively. 



COPPER PRODUCERS' ASSOCIATION REPORT 

The Copper Producers' Association statement, July 8, 
shows a decreased surplus. The details are as follows: 

Pounds. 

Stock of marketable copper of all kinds on hand 
at all points in the United States, June 1, 

1913 67,474,225 

Production of marketable copper In the United 
States from all domestic and foreign sources 

during June 121,860,853 

Deliveries for consumption, June 68,452,572 

Deliveries for export, June 68,067,901 

Stock of marketable copper of all kinds on hand 

and at all points in the U. S., July 1 52,904,606 

Recent changes in surplus have been as follows, in pounds: 

Increase. Decrease. 

June 1912 5,280,639 

July 5,945,416 

August 

September 16,364,213 

October 13,679,380 

November f 9,419,095 

December 19,148,523 

January 1913 17,885,770 

February 

March 

April '. -. 

May '■■ 

June 



3,579,046 



896,134 
18,032,928 
28,720,162 
8,074,883 
14,569,619 



JUNE COPPER PRODUCTION 

Pounds. 

Anaconda group 21,500,000 

Anaconda group (half-year's total) 136,050,000 

Baltic 1,814,000 

Braden (68,127 tons ore) 1,300,000 

Chlno 3,094,286 

Copper Queen 6,292,480 

Copper Queen smelter 10,900,000 

Calunlet & Arizona 4,400,000 

Champion 2,640,000 

Detroit 1,750,601 

Franklin 290,000 

Granby, from 104,508 tons of ore smelted 1,789,000 

Miami 2,612,600 

Moctezuma 3,438,793 

Mohawk 1,164,000 

Phelps-Dodge total 12,661,328 

Quincy 2,336,000 

Shannon 924,000' 

Trimountain 992,000 

Wolverine 856,000 



78 



MINING AND SCIENTIFIC PRESS 



July 12, 1913 



Australian Copper Production 

The following is from L. Vogelstein & Co.'s copper 
statistics for 1912: 

Pboductiox or tiie Various States ix Toss 

1911. 1912. 

Queensland 20,521 23,157 

New South Wales * 9,351 8,981 

South Australia 6,140 6,505 

Tasmania 6,042 5,370 

Western Australia 2,473 1,274 

Miscellaneous 128 181 

44.655 45,463 

PROIIt'CTIOX OF TIIE MOST IMPORTANT MIXES IX TOXS 

1911. 1912. 

Mt. Morgan 7061 8990 

Great Cobar 6466 6650 

Mt. Elliott 5983 6692 

Wallaroo 6079 6290 

Mt. Lyell 6992 5058 

Mt. Lyell's normal production has been over 8000 tons: 
a strike in 1911 and a Are In the mine in 1912 explain 
the lower production in these two years. The production 
of the Wallaroo mine is shipped to Europe as refined ingot 
copper. Of the remaining production, about 17,500 tons 
are refined electrolytically in Port Kembla, and the balance 
is shipped to Europe and the United States in the form 
of blister, matte, and ores. The estimate of refined cop- 
per produced In Australia shows that about 1000 tons re- 
main in the country. England exported to Australia in 
copper manufactures, excluding brass, 3500 tons in 1911 and 
4161 tons in 1912. During recent years a large proportion 
of the Australian production has been refined in Australia 
and comes on the European market in the form of elec- 
trolytic copper. This enhances appreciably the importance 
of Australia as a copper-producing country, on the list of 
which she stands fifth. 



ty, including the Verde district, produced 34,043,005 lb. of 
copper, against 36,103,649 lb. in 1911, and' 40,824,556 lb. in 

1910. Gila county, including the Globe district, produced 
63,969,423 lb. of copper in 1912, against 49,226,341 lb. in 

1911. In Pinal and Gila counties the so-called low-grade 
schist and porphyry ores yielded 76,848,299 lb. of copper, 
against 30,666,515 lb. in 1911. The copper output of Green- 
lee county «b largely from the same class of deposits. 

The production of lead in Arizona in 1912 was 6,806,443 
lb., valued at $306,290, against 10,274,552 lb., valued at 
$462,355, in 1911. Cochise county is credited with 3,776,867 
lb., valued at $169,959, the largest part of which was de- 
rived from the copper mines in the Warren district. Mo- 
have county followed with 1,937,031 lb. Increased output 
was made in 1912 from Yavapai county, but there was a 
decrease in Santa Cruz county. Concentrate yielded 1,731,- 
242 lb. of lead in Arizona in 1912, and 5,075,201 lb. was 
contained in crude ore sent to smelters. 

The spelter production of Arizona was 8,758,243 lb., val- 
ued at $604,319, in 1912, against 4,562,984 lb., valued at 
$260,090, in 1911. Mohave county produced mainly from 
the Union Pass and Chloride camps, 8,304,462 lb. of spelter 
in 1912. against 4,476,552 lb. in 1911. Productions of zinc 
were also recorded in Yavapai, Pima, Santa Cruz, and Co- 
chise counties. 

There were 444 mines producing gold, silver, copper, lead, 
or zinc in Arizona in 1912, against 397 in 1911, and the 
total quantity of ore sold and treated was 6,840,082 short 
tons, an increase of 2,272,943 tons. 



Metal Production in Arizona 



The total value of the mine output of gold, silver, copper, 
lead, and zinc in Arizona in 1912, according to V. C. 
Heikes, of the United States Geological Survey, was $67,- 
050,784, against $44,157,223 in 1911. This large increase 
in value was due mainly to the increase in the produc- 
tion of copper. « 

The production of gold in Arizona in 1912 was 181,996.90 
oz., valued at $3,762,310, an increase in value of $331,807. 
Of this output, 2082.36 oz. came from placers, 112,067.77 oz. 
from dry or siliclous ore, and 57,507.86 oz. from copper 
ore. From bullion recovered in gold and silver mills, 102,- 
244.72 oz. was produced, concentrate yielded 10.276.48 oz., 
and crude ore sent to smelters contained 67,086.88 oz. The 
largest production of gold was from Mohave county — 
$1,899,131 in 1912, against $1,547,663 in 1911. 

Arizona's silver production in 1912 was 3,490,387 oz., val- 
ued at $2,146,588, against 3,276,571 oz., valued at $1,736,583. 
in 1911. Of this output, 2,378,593 oz. came from copper 
ore, 373.255 oz. from silicious ore, and 599,110 oz. from lead 
ore. Bullion produced at gold and silver mills yielded 
45,660 oz. of silver in 1912, concentrate produced 387,159 
oz., and crude ore sent to smelters contained 2,982,049 oz. 
Cochise county mines produced 1,962,644 oz. of silver in 
1912, against 1,946,319 oz." in 1911, and Yavapai 1 county 
produced 748,872 oz. in 1912, against 764,744 oz. in 1911. 

Copper production increased in Arizona from 306,141,538 
lb., valued at $38,267,692, in 1911, to 365,038,649 lb., valued 
at $60,231,377 in 1912. Arizona continued to rank first 
among the copper-producing states in 1912. Concentrate 
produced 135,666,375 lb. of the output, and crude ore sent 
to smelters produced 224,141,378 lb. Cochise county, which 
includes the great Warren or Bisbee district, produced 147,- 
654,661 lb. of copper, against 132,290,007 lb. in 1911. Green- 
lee county, embracing the Copper Mountain and Greenlee 
districts of the Clifton-Morenci region, produced 76,848,299 
lb. of copper, against 70,926,330 lb. in 1911. Yavapai coun- 



Metal Output of the Central States 

The value of the output of silver, copper, lead, and zinc 
in the states of Arkansas, Kansas, Michigan, Missouri, Okla- 
homa, Wisconsin, and northern Illinois in 1912 was $79.- 
675,814, an increase of $15,156,370 over the value for 1911 
and of $23,349,111 over that for 1908, according to the U. S. 
Geological Survey. The total value of the production of 
these metals for the years 1908 to 1912, inclusive, was $327,- 
385,994, of which $151,830,008 was for copper, $98,188,656 
for zinc, $70,217,618 for lead, and $1,150,512 for silver. 

Receipts at the San Francisco Mint in June were as 
follows: 

Fine oz. 

Alaska 9 - 323131 

Arizona 10,615.523 

California 20,182.746 

Colorado 1089 

Idaho 37282 

Nevada 3 ' 848 ' 297 

New Mexico 297.673 

Oregon 335 297 

Utah 26 ' 37G 7 

Philippine Islands 2,214.697 

Washington 5353 

Refineries, Government offices, etc 177,648.121 

Mutilated United States coin 81.390 

Foreign coin 9,643.655 

Jewelry 849 ' 337 

Mexico 70 ' 258 

Northwest Territory 7 - 368 

Total receipts 235,187.593 

Value of gold, $4,861,759.03. 

The special meeting of the Tuolumne Copper Co. stock- 
holders on August 18, is to increase the stock from 800,000 
shares to 1,500,000 shares, par value $1, to take over the 
mines of the Butte Main Range Mining Co. in the East 
Butte district. The promoters are trying to get Pilot Butte 
to join the combination, and there is also a possibility of 
the Colusa-Leonard coming in later. 

Imposts of copper into Russia continue to grow smaller 
as the domestic production increases. The only copper 
imported in 1912 was electrolytic, of which the domestic 
production does not yet come up to requirements. 



July 12. 1913 



MINING AND SCIENTIFIC PRESS 



7!t 



Philippine Mineral Production 

The following statistics of mineral production In tbc 
Philippine Islands for the year 1913 hare been compiled by 
the division of mince. Bureau of Science: 



Ore Reserves of Rand Mines 

The table* complied by tho South African Utnino Journal 
classify the ore reserves of the mines according to the 
various controlling bouses or groups, and deal with only 



, 1911 , 

Quantity. Value. 

t> 29.169 
3,606 
379,906 
600 



Metallic: 

Iron, metric tons 78 

Silver, fine ounces 3,383 

Gold, fine ounces 9,190 

Copper, kilograms 1,100 

Non-metallic: 

Coal, metric tons 20,000 130,000 

Clay products 450,000 

Lime 90.000 

Sand and gravel 477,344 

Stone 655,795 

Salt, metric tons 18,333 550,000 

Mineral waters, litres 300.000 60,000 



quantity. 
141 
7.121 
27.582 



-1912- 



2.720 



19.147 
264.871 



( + ) Increase. 
( - ) Decrease. 



Total M.826,410 

One peso Philippine currency Is equal to 50c United States currency. 



Value. 


Quantity. 




Value. 


' 49.272 


+ 68 


+t» 20,113 


8 664 


■4- 8,738 


+ 


6.058 


1,140.424 


+18,392 


+ 


760.518 




- 1,100 




600 


20,200 


-17.280 




109.800 


453,000 




+ 


3,000 


92,026 




+ 


2.026 


468.760 






8.694 


651.049 






4.746 


674,611 


+ 814 


+ 


24,611 


65,849 


-35,129 




4.161 


3.513,745 









Mineral Production of Peru in 1911 



According to the Boletin 78, del Cuerpo de Ingenleros de 
Minns del Peru, the mineral output was as follows: 

Quantity, Value. 

Mineral. metric tons. Lp. 

Coal 324.000 194,165 

Petroleum 195,276 785,071 

Gold, fine 101,152 

Silver, fine 926,713 

Copper, fine 27,734 1,411,416 

Lead, fine 2,209 12,541 

Vanadium, ore 2,251 215,000 

Bismuth, fine 24.5 7,329 

Tungsten, ore 48.6 4,326 

Mercury 0.65 123 

Borax 1,923 16,922 

Salt 24,867 24,867 

Total value, 3,699,615 Lp., equal to $17,760,000. 



New Zealand Mines under the control of the Consolidated 
Goldflelds of New Zealand, at Reefton, South Island, pro- 
duced as follows in May: 

Working 

Tons. Yield. Profit. costs. 

Wealth of Nations 1,996 $16,000 $5,000 $3.98 

Progress 2,725 10,500 4.32 

Blackwater 3,991 36,000 11,000 4.46 



At a meeting of directors of the Tuolumne Copper Co. 
on June 30, It was decided, after a lengthy discussion, to 
postpone ordering the payment of the quarterly dividend. 
The Company has only $50,000 in the treasury. A report 
presented by the mine's superintendent stated that the 
company has just opened a fine body of ore on the 2200- 
ft. level. 



Application has been made for the appointment of a 
receiver for the Butte & Ely Copper Co. A restraining 
order has also been asked for enjoining the Company from 
transferring shares of stock held by one Heilbronner to 
organize the Consolidated Copper Mines Co. A hearing 
will be given on July 26. 



The Consolidated Copper Mines Co. has extended the 
time for the exchange of the stock of the Giroux Consol- 
idated Mining Co., Butte Ely Copper Co., and the Chain- 
man Consolidated Copper Co. until July 5. Certificates 
have been deposited with the Guaranty Trust Co. by noon 
of July 2. 



IirpoRTS of chromate and bi-chromate of potash into the 
United States in 1912, were 32,913 lb. valued at $3085. 



'payable,' fully exposed, and fully valued tonnages, except 
in one or two special instances. The group aggregates are 
as follows: 

No. of 

Group. mines. Tons. 

Central Mining & Investment Corporation 15 38,663,916 

Consolidated Gold Fields of S. Africa. ... 5 8,655,403 

East Rand Proprietary Mines 1 6,013,000 

Anglo-French Exploration Co 1 1,687,101 

Consolidated Mines Selection 1 2,457,000 

Randfontein-Langlaagte 2 8,970,639 

General Mining & Finance Corporation. . 7 6,808,889 

Johannesburg Consolidated Invest. Co. . 8 6,740,909 

S. Neumann & Co 5 4,268,634 

A. Goerz & Co 4 2,721,500 

Independent Company 1 500,471 



50 



87,387,462 



The Mt. Ross mine, New England district, New South 
Wales, produces tin and diamonds, a peculiar combination. 
The wash containing tin is sometimes thin, but the doler- 
ite overburden is often 36 in. thick, and contains the dia- 
monds. A six-day run in May resulted in the treatment 
of 64 loads of wash, yielding 280 lb. black tin, and 201 
carats of diamonds worth $4.80 per carat. 



The following is the gold production of Rhodesian mines 
in May, 1912: 

Tons. Value. Profit. 

Eldorado 7633 $ 88,300 $ 48,000 

Globe & Phoenix 6420 207,000 139,000 

Lonely Reef 4900 83,000 



Diamonds worth $1475 were mined in the United States 
in 1912. They are mostly found in Arkansas. The Ozark 
Diamond Mines Corporation has erected a plant capable of 
washing 100 'loads' of 16 cu. ft. daily, according to the U. S. 
Geological Survey. 



The principal gems mined in the United States in 1912 
were the sapphires from Fergus county, Montana. These 
were worth about $195,505, while the value of about 40 
various gems and stones, was $319,722. 



Chbomic-iron ore production in the United States during 
1912 was 201 long tons valued at $2753. This came from a 
mine near Dunsmuir, Siskiyou county, California. Imports 
were 53,929 tons valued at $499,818. 



Cost of mining the deep leads of Victoria, Australia, aver- 
ages about $10.35 per fathom of wash. This yields $16 
per fathom at the Great Southern, Rutherglen, and $11.20 
at the Duke Consols, Maryborough. 



so 



MINING AND SCIENTIFIC PRESS 



July 12, 1913 



Company Reports 



TRONOH MINES, LTD. 
The report of this Company, owning the premier tin 
mine of the Malay Peninsula, shows that 496,495 cu. yd. 
of ground was washed, yielding 2776 tons of concentrate, 
which sold for $1,680,000. The average yield, was 12.5 lb. 
per cubic yard. During 19ll, the output was 3856 tons 
of concentrate, worth $2,110,000, the yield yer yard being 
21 lb. For several reasons, the 1911 output was abnormal. 
The accounts show a profit of $758,000, out of which 
$576,000 was distributed as dividend, being at the rate of 
75%, and $144,000 'was written off the property account. 
Mr'. Griffiths has recommended the adoption of bucket- 
dredging for a portion of the ground, and A. C. Perkins 
has confirmed his view. This ground is too irregular in 
content to be suitable for the present methods used in 
the richer parts of the Company's property. 

LAHAT MINES, LTD. 
This Company is nearly allied to the Tronoh, and was 
formed in 1906 to acquire tin-bearing ground at Lahat. 
in the Kinta district of Perak, Federated Malay States. 
The capital is $576,000, and dividends at the rate of 2«>, 
10, 15, and lTt>% have been paid for the years 1909 to 
1912, respectively. The report for 1912 shows that 270,927 
cu. yd. of karang was treated, and 441 tons of cassiterite 
concentrate recovered. This sold for $264,000, the price 
received averaging $6096 per ton. The ground let on trib- 
ute brought an income of $23,000. The mining cost was 
$149,000, and after the payment of London expenses and 
Income tax, and allowing for depreciation, a balance of 
$115,000 remained. Out of this, $112,800 was distributed 
as dividend, being at the rate of 171,4%. Additional prop- 
erty has been acquired connecting the old property with 
the granite hills to the west. O. S. Dawbarn is the man- 
ager. 

YUKON GOLD COMPANY 
The balance sheet of this company, as shown by the re- 



port for the year that ended on December 31, 1912, was as 

follows: 

Assets: 

Property and investments $12,026,120.72 

Equipment 6,935,801.29 

Deferred charges (including stripping) .. . 441,279.15 

Advanced royalties 340,604.44 

Supplies and materials 879,292.04 

Accounts collectable 502,965.16 

Cash 97,350.98 



$21,223,413.78 

Liabilities: 

Capital stock $17,500,000.00 

Guggenheim Exploration Co 2,524,972.21 

Bills and accounts payable 202,272.45 

Depreciation 586,893.45 

Surplus 409.275.67 



$21,223,413.78 

Details regarding the operations of the year were given 
June 2S. Since the report was issued It has been an- 
nounced that the Company has leased important dredging 
grounds on the American river in California and will at 
once place in operation tBere a 7Vi-ft. Bucyrus dredge. 
This, with the new work at Idjtarod, adds materially to 
the probable profits of the concern. 

OURO PRE:TO GOLD MINES OF BRAZIL, LTD. 
This Company was formed by John Taylor & Sons in 
ISS4 to acquire the Passagem gold mine, Minas Geraes, 
Brazil. Arthur J. Bensusan is superintendent. The report 
for the year 1912 shows that 68,486 tons of ore was treated, 
yielding gold worth $508,000. The working cost was $432.- 
000, and royalty $17,700: $43,000 was allowed for depre- 
ciation and $17,700 was distributed among preference 
shareholders, being at the rate of 10%. The 100,000 ordi- 



nary shares received no dividend; in fact, only $1 per 
$4.80 ordinary share has so far been paid. Labor short- 
age continues to be one of the troubles at this mine, and 
efforts are being made to obtain workmen from Europe 
and elsewhere. Development during the year has not 
given good results, and the ore reserve has decreased 
30,000 tons, and on December 31 were approximately 2'^ 
years' supu^\ The lode is flat and has hitherto been 
worked by incline shafts. A main vertical shaft was start- 
ed two years ago, calculated to cut the lode at 2000 ft. on 
the dip. Owing to the water troubles, sinking has been 
delayed. 

LONELY REEF GOLD MINING COMPANY, LTD. 

This Company has a capital of 325,000 £1 shares, of 
which 271,007 have been issued, and 53,993 are in reserve. 
The property consists of 234 claims, water rights, etc., in 
the Bubi district of Rhodesia, 50 miles north of Bulawayo 
The report of the general manager, Francis Drake, covers 
the year ended December 31, 1912. Mr. Drake, till re- 
cently consulting engineer, is now manager, and A. W, 
Allen is metallurgist. 

Development in the mine covered 3701 ft., besides 1459 
cu. yd. of stations, winze chambers, and sumps. The main 
shaft is 1050 ft. deep. Stoplng has been done at several 
points between the No. 2 and No. 7 levels. More ore was 
broken than was milled, the excess amounting to 11,544 
tons, and the total quantity lyiug in the stopes at the 
end of the year was calculated to be 13,074 tons. Almost 
all of this is in shrinkage stopes, which are the most 
economical to work in certain portions of the mine. An- 
other advantage of this method of stoping is that the 
mine is independent of fluctuations in the supply of native 
labor. Two additional levels, the eighth and the ninth, 
were opened during the year at depths of S95 and 1020 ft., 
respectively. On No. S level, 626 ft. was driven, of which 
604 ft. was in ore; and 398 ft. was driven on No. 9 level, 
of which 166 ft. was in ore. These levels have not yet 
been extended to the full length of the ore-shoot, and 
driving is being continued in pay-ore. Shaft-sinking was! 
suspended toward the end of the year, owing to the fact 
that the ore-shoot showed signs of trending again to the 
south, as it does in the upper levels of the mine. To 
determine this treud, a winze has been sunk from No. 9 
level. This is now down 104 ft. in rich ore, without hav- 
ing reached the northern limit of the ore-shoot. The 
length sampled in this winze is 73 ft. Of this, the first 
23 ft. averages 12.16 dwt. over 48.83 in., the next 25 ft. 
averages 29.31 dwt. over 50.25 in., and the last 25 ft. aver- 
ages 37.36 dwt. over 36.8 In., the reef not having been 
fully exposed in places. This winze is the deepest point 
yet reached in the mine, being now 1124 ft. from the sur- 
face. Arrangements have now been made for the sinking 
of an incline shaft below the No. 9 level for the develop- 
ment of the deep ground in the mine. The new hoisting 
station and ore-bins for this inclined shaft are being pre- 
pared, and sinking will be started as soon as possible. 
The additional plant required for the purpose has been 
ordered. 

The ore reserves at December 31 last were estimated 
at 174,529 tons, of an average assay value of 22.40 dwt. They 
show an increase, after deducting the 37,655 tons sent to 
the mill, of 24,185 tons compared with the estimate of 
140,344 tons at December 31, 1911. The present reserves 
represent approximately a 3% years' supply of ore for 
the reduction plant, calculated on a working capacity of 
4000 tons per month. The average assay value of the 
reserves is slightly less than that shown in the previous 
year, owing to the inclusion of some blocks of lower-grade 
ore at the southern end of the ore-shoot. The results of 



operations were as follows: 

Ore treated, tons 37.655 

Old slime treated, tons 6,331 

Total gold production $768,000 

Mining, milling, treatment, etc 245,000 

General, office, directors, taxes, etc 139,000 

Profit v 384,000 

Dividends paid 259,000 

Capital expenditure, development, equipment 134,000 



July 12. l!>ia 



MINING AND SCIENTIFIC PRESS 



HI 



Book Reviews 



COMWAKO UCULOOICAL SlIRVKY, Biujfti* No. 6. By R. D. 
George P. 406. Maps, diagram*. Index 

The main purpose of the bulletin Is to describe the 
commoner minerals and rorks, and furnish the means of 
reroicnlilnc them and of knowing their uae. Many valu- 
able geological materials lie unused for lack of knowledge 
of what they are and how they may be used. It Is hoped 
that this work may stimulate an Interest In and n aenrch 
for the valuable geological products. In this book the au- 
thor has endeavored to present a handbook of rocks In a 
form which will be comprehended by everyone Interested 
In the Important facts regarding the materials of geology. 
Emphasis has been given to the Important minerals and 
rocks, unimportant species being described only where their 
Intimate relationship to the more Important types has 
made It necessary, or where the possibilities of economic 
uses have made It desirable. The work Includes a dis- 
course aa crystallography, showing with Illustrations the 
various crystal forms as found In nature. It also discusses 
cleavage, fracture, hardness, specific gravity, color, lustre, 
streak, and other physical features by which the various 
minerals may be recognlied. it then describes in detail 
the rock-making minerals, non-metallic minerals, gem min- 
erals, and the metallic minerals, giving the various char- 
acteristics of each and the method by which they may be 
recognised. The characteristic reactions of the important 
elements are given. The common rocks are described under 
the heads of Igneous and sedimentary, and the subject of 
metamorphism and the metamorphic rocks is also included. 
Building stones, the materials of cements, limes, and plas- 
ters are also covered by this work. A glossary of geolog- 
ical terms Is included. 



The Men Who Blaze the Trail. By S. C. Dunham. 
P. 120. Barse & Hopkins, New York. 

This little book of verse Is one of the charming by-prod- 
ucts of mining in the Far North. In it Mr. Dunbam voices 
the thoughts and feelings of the Alaska 'sour-dough' as 
Mr. Service has done for his brothers in the Yukon. The 
modest little volume is intensely photographic; the verses 
are word pictures of things as they are, or at least as 
they were in the early years at Nome. Incidentally, Mr. 
Dunham has phrased, and excellently, the feeling of help- 
lessness and hopelessness that has come to the sturdy, 
self-reliant pioneers of the North who face new conditions 
that thoy neither approve nor understand. Thus: 
"We're too slow for the new breed of miners, 
Embracing all classes of men, 
Who locate by power of attorney 

And prospect their claims with a pen — 
Who do all of their fine work through agents, 

And loaf around town with the sports, 
On intimate terms with the lawyers, 
On similar terms with the courts." 
Mr. Dunham has caught the brooding spirit o£ the North, 
but he also knows the desert, and his later poems, in which 
he depicts life in Nevada, are equally interesting. Thus 
he sums up the campaign of 'Lem Allen of Churchill' for 
the position of lieutenant-governor in 1903: 
"And if Lem keeps on talking and treating 
In the extra dry way he's begun, 
He will turn down the traitors to Silver 
By a ratio of sixteen to one." 



Psychology and Industrial Efficiency. By Hugo MUns- 
terberg. Pp. 321. Index. Houghton, Mifflin Co., Boston. 
For sale by the Mining and Scientific Press. Price $1.50, 
postpaid. 

Some one has said that lately no publisher has consid- 
ered his list complete unless it contained at least one book 
upon scientific management or efficiency engineering. That 
may be onlv another way of saying that far too many 
books nave been written upon this new but really impor- 
tant science. The book under review does not come under 



the bending of thoae which ware written as n sop to the 
vanity of the author or as an advertisement of hi* pro- 
fessional qualifications. It la. on the other hand, ■ real 
contribution to the science, and one that will go a long 
way toward flooring up much of the general dlatruat of 
so-called scientific management methods. It la written In 
a simple and readable style, free from unusual technical 
terms. After a general Introduction on 'Applied Psychol- 
ogy,' the author discusses 'The Best Possible Man,' The 
Best Woik,' and 'The Brst Possible Effect.' A few of the 
chapter headings, selected at random, will give a good 
general Idea of the contents: Vocation and Fitness. Sci- 
entific Vocational Guidance. Experiments In the Interest 
of Electric Hallway Service. The Adjustment of Tech- 
nical to Psychical Conditions. The Economy of Move- 
ment. Experiments on the Effects of Advertisements. 
Buying and Selling The Future Development of Economic 
Psychology. 

"The book has a message for everyone Interested In 
either industrial or human efficiency, even though Its 
human efficiency message may chiefly concern one's own 
self." 



Recent Publications 



ESTADISTICA MlNERA DEL PERU EN 1911. By CarlOS P. 

Jimenez. Boletin del Cuerpo de Ingenieros de Minas del 
Peru. P. 80. Lima, 1913. 

Magnetic Iron Sands of Natashkwan, Quebec. By Geo. 
C. Mackenzie. Department of Mines Bulletin. P. 57. III. 
maps, charts. Ottawa, 1912. 

Biennial Retort of the State Geologist. North Caro- 
lina Geological and Economic Survey. Joseph Hyde Pratt, 
geologist. P. 118. Raleigh, 1913. 

Wood-Using Industries of Virginia. Compiled by Roger 
E. Simmons. Department of Agriculture and Immigra- 
tion. P. 88. 111. Washington, 1912. 

Publications. This is a catalogue of publications issued 
by the Bureau of Science, Manila, Philippine Islands. The 
papers listed cover a wide variety of subjects connected 
with this territory. 

West Virginia Geological Survey. Part I, 'The Living 
Flora of West Virginia.' by C. F. Millspaugh; and Part II, 
'The Fossil Flora of West Virginia,' by David White. I. C. 
White, state geologist. P. 491. 111., Index. 

CONTRIUUTION A L'l5TUDE GEOLOGIQUE DE LA PARTIE CEN- 

trai.e du Congo Belge. By Sydney H. Ball and Millard 
K. Shaler. Extrait des Annales de la Societe geologique de 
Belgique. P. 51. Map. Liege, Belgium, 1913. 

The Mining Industry in Northern Ontario served by 
the Ontario Government Railway. By Arthur A. Cole. 
Temiskaming and Northern Ontario Railway Commission 
publication. P. 78. 111., plans, index. Toronto, 1913. 

University of Illinois publications. Urbana. 1913: 
The Properties of Saturated and Superheated Ammonia 
Vapor. By G. A. Goodenough and Wm. Earl Mosher. Bul- 
letin 66. P. 94. 111., charts, tables, bibliography. 

Preliminary Report ox Organization and Method of In- 
vestigations. Coal-mine investigations by the State Geo- 
logical Survey, University of Illinois, aDd the U. S. Bureau 
of Mines. P. 71. 111., maps, charts. 

Potash Salts, Summary for 1912. Compiled by W. C. 
Phalen. Advance chapter from 'Mineral Resources of the 
United States, 1912.' U. S. Geological Survey. P. 36. Mr. 
Phalen has brought together in this little pamphlet, not 
only the statistics of consumption and imports, but sucli 
data as are available bearing on the problem of possible 
local production. He has given a brief summary of the 
investigations now being conducted by the U. S. Geological 
Survey and the Bureau of Soils, and indicates several 
promising fields. Mr. Gale's statement regarding the Searles 
lake deposits is quoted elsewhere. In It important data 
supplementary to the brief announcements made by the 
Survey last year are published. 



82 



MINING AND SCIENTIFIC PRESS 



July 12, 1913 



Concentrates 

Most of these are in reply to questions received by malL 
Our readers are Invited to ask questions and give informa- 
tion dealing* with the practice of mining, milling, and smelting. 



Idle r&ilww cabs in the United States in May totaled 
60,294. There were 10,000 new cars bought during the 
month. 



Concentration of 390,473 tons of ore, by 14 mills, at 
Cobalt during 1912, resulted in 10.527 tons of concentrate, 
a ratio of 37 to 1. 



Standard rack and pinion ore-bin gates are of the fol- 
lowing sizes: IS by 24, 20 by 28, 24 by 30, and 30 by 36 in., 
with their respective weights of 225, 250, 275, and 325 
pounds. 

Shipping through the Suez canal in 1912 totaled 5373 
ships of 20,275.120 net tons. Receipts were $27,005,068, and 
dividends paid $16,847,540. This should be something to 
compare with the Panama canal when in full operation. 

Horse-power of turbines on the German steamer Impe- 
rator, the largest in the world, totals 60,000 hp. Her di- 
mensions are: length, 919 ft., and beam, 98 ft., 9 decks 
above water-line, 36 water-tight compartments, and 50,000 
tons. 



'Timbering' in the main shaft of the Lonely Reef mine, 
Rhodesia, has been done with wood to 795-ft. depth, and 
with steel sets the remaining 255 ft. Although more ex- 
pensive in first cost than the wooden timbers, the steel is 
practically indestructible. 

Crushing equipment at the Miami mill, Arizona, is being 
increased by the installation of two sets of 16 by 42-in. 
Miami heavy-type rolls of Traylor make, and two sets of 
screens. This increase of plant will produce Vs-in. size of 
ore for further treatment. 



Treatment of the Lonely Reef mine. Rhodesia, consists 
of twenty 1250-lb. stamps each; two tube-mills 5 by 14 ft,, 
and one 5H> by 16 ft.; four 20-ft .Ham. Dorr thickeners; four 
8 by 32-ft. Pachuca agitators; and three Dehne filter- 
presses, with 50 chambers 40 In. spuare. 



Gold and silver exports from New York from January 1 
to June 21, 1913. totaled gold, $60,179,782, and silver, $25,- 
016,845, against $22,483,762 and $24,984,679, respectively, in 
1912. Imports totaled gold, $8,516,135, and silver, $4,450,675, 
against $10,248,474 and $5,245,674 in 1912. 



Tobin bronze is a composition containing between 59 and 
63% copper, 0.5 and 1.594 tin, and a small percentage of 
sine It has a bright golden color, specific gravity of 8.4, 
melting point of 1600°F., weighs 0.303 lb. per cubic inch, 
and can be welded by electric or oxy-acetylene processes. 



Diamond-cutting is mostly done In Europe, at Amster- 
dam and Antwerp, 23,000 persons being engaged in the 
industry, and the cost being about $24,000,000 per year. 
It is now proposed to do a lot of this work in South Africa, 
which, last year, exported uncut diamonds worth $57,600,000. 



Mining costs at the Calumet & Hecla properties during 
1912 were as follows, according to the Houghton Mining 
Gazette: Ahmeek, $1.39; Allouez. $1.61; Calumet & Hecla, 
$1.91; Centennial, $1.92; Isle Royale, $1.54; Osceola, $1.23; 
Superior, $2.33; and Tamarack, $2.23; an average of $1.77 
per ton. 

Treatment of mixed sand and slime, or slime alone, by 
upward displacement is attracting some attention in the 
United States, and good results are said to have been se- 
cured. There are difficulties in getting uniform results, 
and everything must be in extremely nice adjustment Up- 
ward displacement was tried at the Westralia Mt. Morgan's 
mill, and a slime plant at Kalgoorlle for treating old 
dumps, several years ago, but results were hopeless. 



In agitating slime with barren solution, it Is difficult in 
many cases to find an ore which will allow sufficient decan- 
tatlon to take- place to furnish enough solution for agitation 
purposes. On clayey ores the upward current of the solu- 
tion through the decanting zone carries slime particles 
with it in every case, and under all conditions 



Unconsume§ oases in boiler flues are liable to cause ex- 
plosions. Recently, at a mine in Western Australia, a 
boiler fireman shut the damper down and stopped the fan 
to 'blow down' the boiler. After doing this, he opened the 
damper, and flames from the wood fuel exploded the ac- 
cumulated unconsumed gases, blowing out a quantity of 
brickwork. 

The fiame blow-in of a Case gasoline melting furnace 
is placed so that the flame enters the furnace on a tangent 
and does not hit the crucible until there is complete com- 
bustion. The hot gases circle around the crucible, thereby 
preventing the loss of crucibles by cracking, and saving 
their wear and tear to such an extent that their life is 
lengthened several melts. This furnace is made in three 
sections, or practically divides in the centre, so when the 
upper ring Is lifted off it leaves the upper portion of the 
crucible so exposed that it can be removed with basket 
tongs. 

Railroad tunnels through the European Alps are the 
Mont Cenis, St. Gothard, Arlberg, Simplon, and Lotschberg. 
The latter is about 9»4 miles long, the St. Gothard 9>j 
miles, and the Simplon 12*4 miles. After nearly two years' 
work in the Loetschberg 'headings', an accident occurred. 
It was supposed by the engineers that the detritus form- 
ing the floor of the Gastern valley ended well above the 
line of the tunnel, which in consequence would be driven 
in solid rock. This supposition was wrong, as there was 
a rush of sand, gravel, and water, amounting to 250,000 
cu. ft., filling the heading for nearly a mile and killing 
25 Italian miners. Later on, a new heading was started, 
and work was completed on March 31, 1911. 



Clean up barrels, as used at Kalgoorlie for treating the 
amalgam, rich concentrate, and chippings from grinding 
pans, or sundry material from the clean-up room, are sim- 
ply of cast iron, 2 In. thick, with a 3-in. shaft fitted through 
the centre and extending outside for bearings and driving 
gear. They are best driven by gearing at about 20 r.p.m. 
One side of the barrel has a heavy door about 10 by 18 
in., well fitted in a hole, and is clamped down The ma- 
chine is charged with the material to be ground, enough 
water added to make a thick pulp, and enough quicksilver 
to collect all gold and amalgam. Lime or soda is added 
to clean the mercury. About four rollers, say 4 by 12 in., 
are also added for grinding, which occupies about 12 hours. 
After this time, the barrel is opened, the pulp run into a 
box or vat, thinned with water, and then run over riffles. 
The residue is rich and is caught in a box, and returned 
to 'the pans. The barrel does good work and may be se- 
curely locked. 

Quicksixveb occurs in nature principally as sulphide, 
namely, cinnabar. The deposits in the United States are 
found generally in simple fissure fillings, frequently irregu- 
lar and linking together larger fillings; in compound frac- 
ture zones; along bedding planes or other contacts; and 
disseminated in the adjoining rocks. The ore-shoots are 
often very irregular and sometimes lenticular. They are 
found in many kinds of igneous, sedimentary, and meta- 
morphic rocks of various ages, such as granitic, quartz por- 
phyritic, rhyolitic, andesitic, diabasic, and basaltic igneous 
rocks, limestones, sandstones, shales, serpentines, slates, 
and quartzites. Cinnabar, the principal ore, has a formula 
of HgS, and contains up to 86.2% mercury. It has a beau- 
tiful red color, and is found in crystalline incrustations, 
intergrowths, and impregnations, also granular, massive, 
and earthy. Its hardness is 2 to 2V», and specific gravity 
8 to 8.2. When scratched, it gives a scarlet streak. The 
ordinary variety is crystallized, massive, and earthy, and 
bright red to reddish brown in color. 



July 12, 1913 



MINING AND SCIENTIFIC PRESS 



n 



High- Volume- Direct-Current Locomotives 



The electrification of the Butte. Anaconda 4k Pacific rail- 
war la of exceptional Intercut because It represents one of 
the largest Installations of electrical equipment for steam 
railroad service and la the first In this country where 
direct-current locomotives, operating on as high a poten- 
tial as 2400 volts, will be employed. Construction work 
necessary to effect the change from steam to electric equip- 
ment Is now practically completed. 

The adoption of the 2400-volt. direct-current system for 
this railway was determined after a comprehensive study 
of local conditions and requirements. The traffic demands 
are unusually severe, and consist principally of hauling 
long trains of copper ore over heavy mountain grades. 
In comparison with other existing systems, the 2400-volt, 
direct-current system was considered best suited for exact- 
ing service of this character; for its adoption presented 



Ulned. The average train it composed of a locomotive 
and three standard steam-road i«saenger coaches. All 
the locomotive equipment, as well as the sub-station appa- 
ratus and overhead line material, was designed and built 

by the General Electric Company. 

The principal data and dimensions applying to the 
locomotives are the following: 



Length inside or knuckles 37 ft 4 In. 

Length over cab 81 ft. 

Height over cab 12 ft 10 in. 

Height with trolley down IB ft 6 In. 

Width over nil 10 ft 

Total wheel base 26 ft. 

Rigid wheel base 8 ft. 8 in. 

Track gage 4 ft 8% In. 

Total weight 160,000 lb. 

Weight per axle ' 40,000 lb. 

Wheels, steel tired 46 In. 

Journals 6 by 13 in. 





OIRECT-CURRENT LOCOMOTIVE, 2400-VOLT. 



an opportunity to realize unusual economies, both in ini- 
tial expenditure and the cost of operation. 

The part of the road that has been equipped lies be- 
tween Butte and Anaconda. Montana. It comprises 30 
miles of main line single track, numerous sidings, yards, 
and smelter tracks, aggregating a total of about 90 miles 
on a single track basis. The haulage of copper ore from 
the Butte mines to the smelters at Anaconda, together 
with all mine supplies, lumber, etc., moving in both direc- 
tions, amounts to practically 5,000,000 tons of freight per 
year. Complete freight trains weighing 3400 tons are 
made up of 50 loaded steel ore-cars and will be operated 
over a ruling grade of 0.3% by a locomotive consisting 
of two of the units illustrated. Single units will be used 
for making up trains in the yards and for spotting cars. 

The initial equipment consists of seventeen locomotive 
units, type 0440-E-160-4 GE 229A; fifteen for freight and 
two for passenger service. Each unit weighs approximately 
80 tons. The two units for forming the freight locomo- 
tives in each case will be coupled together and operated 
in multiple unit. The combination freight locomotives 
will haul the usual trains of 3400 tons at a maximum 
speed of 15 miles per hour against the ruling grade, and 
at 21 miles per hour on level tangent track. The passen- 
ger locomotives are the same design as the freight locomo- 
tives, except that they are geared for a maximum speed 
of 45 miles per hour on level tangent track. A schedule 
of eight passenger trains per day, four each way, is main- 



Gears, forged rims, freight locomotives 87 teeth 

Gears, forged rims, passenger locomotives.. 80 teeth 

Pinions, forged, freight locomotives IS teeth 

Pinions, forged, passenger locomotives 25 teeth 

Tractive effort at 30% coefficient 48,000 lb. 

Tractive effort at one hour rating 30,000 lb. 

Tractive effort at continuous rating 25,0,00 lb. 



The locomotives are the articulated double-tru£k type, 
with all weight on the drivers. The cab, containing an 
engineer's compartment in each end, and a central com- 
partment for the control apparatus, is carried by the 
two truck frames on centre pins. The cab is box type, 
extending the entire length of the locomotive, and is 
provided with end and side doors. On each axle is mount- 
ed a motor of the twin-geared type. The friction draft 
gear mounted on the outer end frame of each truck trans- 
mits the hauling and buffing stresses directly through the 
truck frame, diverting these strains from the centre pins 
and underframe. 

The trucks are built of heavy steel castings. The side 
frames are of a truss pattern with heavy top and bottom 
members and pedestal tie bars. They are connected by 
end frames and a cast steel centre transom. The entire 
weight is carried on semi-elliptic springs suitably equal- 
ized. The cab underframe consists of two 12-in. longitud- 
inal steel channels on either side of the centre and two 
6 by 6-in. steel angles along the outer edges. The central 
channels are enclosed and form a distributing air-duct 



84 



MINING AND SCIENTIFIC PRESS 



July 12. 1913 



for forced ventilation. Air Is conducted through the centre 
pins, which are hollow. Into the truck transoms and thence 
to the motors. 

The engineer's compartment, at either end of the cab, 
contains the operator's seat, controller, air-brake valves, 
bell and whistle ropes, ammeter, air gauges, sanders. and 
other control apparatus that should be within immediate 
reach of the engineer. These compartments are comforta- 
bly heated by electric heaters.' In the central section is 
grouped the control apparatus. The contactors, reverser, 
and rheostats are mounted in two banks running length- 
wise of the compartment, and are arranged with ample 
space between them to afford convenient access for clean- 
ing, inspection, and repair. All parts and circuits carrying 
2400 volts are thoroughly protected from accidental con- 
tact. A dynamotor is employed to furnish 600 volts for 
the operation of the contactors, lights, and air-compressor. 

The motors are the GE-229A commutating-pole type, 
wound for 1200 volts and insulated for 2400 volts. A 
forged pinion is mounted on each end of the armature 
shaft and meshes into a corresponding gear mounted on 
the wheel hub. The gear reduction is 4.S4 on the freight 
locomotives and 3.2 on the passenger locomotives. 

The GE-223A motor Is designed especially for locomo- 
tive service, is enclosed, and is provided with forced venti- 
lation. Air Is circulated over the armature and field coils, 
over and through the commutator, through longitudinal 
holes In the armature core, and thence exhausted through 
openings In the bearing head. This method of ventila- 
tion circulates effectively a large volume of cool air through- 
out the motor and keeps all carts at a uniform tempera- 
ture, eliminating the possibility of 'hot spots.' 

The continuous capacity of each motor Is 190 amperes 
on 1200 volts under forced ventilation, and 225 amperes 
on 1200 volts for the one-hour rating. For the double unit 
160-ton locomotive, this is equivalent to a continuously 
sustained output of 2100 borse-power. 

The control equipment on the locomotive is the well 
known Sprague-General Electric, type M, multiple-unit con- 
trol, and is designed to operate the four motors in series 
end series-parallel. The pairs of motors with their respec- 
tive resistances are all connected in series on the first 
point of the controller. The resistance is varied through 
nine points on the controller and finally short-circuited on 
the tenth or running point. The pairs of motors are then 
operated similarly in series-parallel and all resistance is 
cut out on the nineteenth point, which is the full-speed 
running point. This provides a control with ten steps 
in series and nine steps in series-parallel. 

The transition between series and series-parallel Is effect- 
ed without opening the motor circuit, and there Is no ap- 
preciable reduction in tractive effort during the change. 
The smooth transition between control points peimlts ac- 
celeration close to the slipping point of the wheels. A 
switch is provided having manually-operated handles for 
cutting out either part of motors, so that the locomotive 
can then be operated with one pair of motors in the usual 
way. • 

The contactors are actuated by the 600-volt circuit ob- 
tained from the dynamotor and are of a design similar to 
that employed in the standard type M control. The prin- 
cipal variations are embodied in the method of insulating 
for the higher voltage. The arm between the operating 
armature magnet and the arc chute mechanism consists of 
a treated wood spacer insulator; and the contacts and mag- 
netic blow-out, which make and break on the 2400-volt cir- 
cuit, are mounted on mica and porcelain Insulators. 

The main switch is provided with a powerful blow-out, 
so that heavy currents can be opened. The three smaller 
switches, one for each of the two heaters and one for the 
dynamotor circuits, are designed specially for 2400 volts. 
The blade Is controlled by a lever attached to the grounded 
part of the locomotive frame and Insulated from the live 
parts of the switch by a rod of treated wood. 

There is one main fuse for the trolley circuit and two 
fuses for the motor circuits. They are all of the copper 
ribbon type and arc fitted with hinged covers to facilitate 
fuse renewals. The boxes are placed as near as possible 



to the overhead trolley in order to protect the wiring cir- 
cuits near the source of supply. There is also an auxiliary 

circuit fuse for protecting locally the dynamotor and heater 
circuits. The main, motor, and auxiliary fuse boxes are 
provided with |K>werful magnetic blow-outs, energized by 
current passing through the fuse, to insure proper rupture 
of the arc. . 

An anmictHt Is placed at each engineer's position and 
Indicates the current in the circuit of one pair of motors. 
The ammater and air-gauges are Illuminated by a gauge 
light connected in the headlight circuit, so that the head- 
light switch turns on simultaneously the headlight and 
gauge light at the same end of the locomotive. 

The main motor rheostats are formed of cast-iron grids 
assembled in a frame and Insulated by mica. Twenty re- 
sistance units are provided for each passenger locomotive, 
and twenty-six reslstnnce units for each freight unit. The 
rheostat boxes are mounted in an enclosed compartment 
above the banks of contactors. 

Current Is collected by overhead trolleys of the panto- 
graph type. They are pneumatically operated and can be 
put into service from either engineer's compartment by a 
hand-operated valve. Each passenger locomotive is equipped 
with two collectors, and each freight unit with one col- 
lector. A 2400-volt insulated bus line, connected direct 
to the pantographs. Is run along the centre on the roof 
of the cab. The bus lines are connected by couplers be- 
tween the two units of the freight locomotives, so that 
current is obtained from both collectors or from a single 
collector. The collectors and bus lines are adequately 
guarded by ratlings. 

The locomotives are equipped with arc headlights. The 
Interior illumination of the cab is provided by ten Incan- 
descent lamps arranged in two circuits, one lamp being 
placed in each engineer's cab and the balance in the cen- 
tral compartment. In each lamp circuit Is a portable lamp 
with an extension cord. One lamp switch is In each 
engineer's cab. so that one lamp circuit can be con- 
trolled from each end of the locomotive. A 600-volt bua 
line Is provided on the passenger locomotives for lighting 
and a 2400-volt bus line for heating the passenger coaches. 

The air-brakes are the combined straight and automatic 
type. The alr-comrressor. of the CP-26 type. Is two-stage, 
motor-driven, and has a piston displacement of 100 cu. ft. 
of air per minute when pumping against a tank pressure 
of 135 lb. per square Inch. Air is taken from the Interior 
of the central compartment through a screen, which pre- 
vents the entrance of particles of dust. The compressed air 
In passing from the low-pressure to the high-pressure cyl- 
inder Is conducted through radiating pipes on the roof of 
the cab. This reduces the temperature of the air and al- 
lows condensation of moisture before entering the high- 
pressure cylinder. From the high-pressure cylinder It Is 
delivered Into four air-reservoirs, each 12 by 164 in. They 
are placed under the floor of the cab and connected In 
series, which affords a further opportunity for radiation 
and condensation. 

Pneumatic sanders are provided. The sander valves are 
placed within convenient reach of the engineer's seat, and 
valves and boxes are arranged for sanding the track In 
front of the leading wheels when running in either direc- 
tion. The couplers are M.C.B. standard. The bells are 
fitted with automatic bell ringers, and the whistles are air- 
operated. All wiring Is drawn through conduits and care- 
fully protected from possible mechanical Injury. 



Hi'mphrey pi'urs, as described in this journal of June 
2$. will lift water the same as an ordinary pump by suc- 
tion and deliver to heads up to 250 ft. They will operate 
on kerosene, distillate, gasoline, benzol, or any form of 
gas available. 

H. N. Lawbie has opened an office in the Yeon building 
at Portland. Oregon, for microscopic study of ores and rocks 
and for general mining engineering work. 



Coke production of the United States averages about 
400,000 tons per week. 




M INING and Scientific 




1 Science hu no enemy tave the ignorant." 



Whole No. 2765 



Will Ml 107 

M MM K S 



San Francisco, July 19, 1913 



THKK [>UM AKS Ptit »NNI M 
Single Copln. Ten Onli 



MINING AND SCIENTIFIC PRESS 

I » I llll ISHEIJ MAY 24, 1800. 

CONTROLLED BY T. A. RICKARD. 

EDITORIAL STAFF: 
San Francisco 

n FOSTER BAIN ------- Editor 

EUGENE H. LESLIE 1 »„,..._. ™^,,„„ 

M. W. von BERNEWITZ I " " Aaalatant Editors 

New York 

THOMAS T. READ ----- Associate Editor 
London 

T. A. RICKARD - Editorial Contributor 

EDWARD WALKER ... - Correspondent 

SPECIAL CONTRIBUTORS: 
A. W. Allen. Charles Janln. 

Leonard S. Austin. James F. Kemp. 

Gelaslo Caetanl C. W. Purington. 

Courtenay De Kalb. C. F. Tolman. Jr. 

F. Lynwood Garrison. Horace V. Wlnchell. 

PUBLISHED WEEKLY BY THE DEWEY PUBLISHING CO. 

AT 420 MARKET STREET. SAN FRANCISCO. 
Cable Address: Pertusola. Code: Bedford McNeill (2 editions). 

BRANCH OFFICES: 
CHICAGO — 734 Monadnock Bdg. Tel.: Harrison 1620 and 636. 
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Cable Address: Oligoclase. 

ANNUAL SUBSCRIPTION: 

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L. A. GREENE ----- Business Manager 

Entered at San Francisco Postofjice as Second-Class Matter. 

TABLE OF CONTENTS 



EDITORIAL 



EDITORIAL: Page. 

Notes 85 

Colloids and Their Importance 87 

ARTICLES! 

Underestimating the Cost of Milling plants — I 

A. Sydney Addlton 88 

The Symmes Agitator Whitman Symmes 92 

Diamonds and Other Gems Mined in the United States 94 

Geology of the Kalgoorlie Goldfield — II 

Malcolm Maclaren and J. Allen Thomson 95 
Railroads and Transportation Problems in Bolivia. . 

G. W. Wepfer 100 

The Magnet Silver-Lead Mine. Tasmania.. P. G. Talt 102 

Tailing and Ore Treatment at Broken Hill 104 

Workmen's Compensation Problems. . .H. W. Gartrell 105 

Improvement of Miners' Surroundings 106 

Reopening the Hillabee Mine 107 

Rock-Drilling Contests 108 

Copper Statistics and the Copper Market 123 

Sulphuric Acid Production 123 

• Petroleum Production in United States 124 

Gold Production of Western Australia 125 

Copper Leaching at the Nevada-Douglas Property. 127 

The Eureka T & T Hook 128 

The 'Neptune' Diving Apparatus 128 

Sears' Acme Mill 128 

DISCUSSIONi 

Colloids in Ore Dressing A. W. Allen 109 

Winter Work in Alaska. A. E. Garvey; T. A. RIckard 110 
The Microscope in Mining D P. Hynes 110 

SPECIAL CORRESPONDENCE Ill 

GENERAL MINING NEWS 116 

DEPARTMENTS : 

Personal 120 

The Metal Markets 121 

The Stock Markets 122 

Decisions Relating to Mining 124 

Company Reports 125 

Concentrates 126 

Recent Publications 127 

Catalogues Received 127 

Commercial Paragraphs 127 



TT7ATBB ami large corporations are frequently 
* " associated in the mind of the public, but the 
conjunction is sometimes a profitable one. The Ni- 
agara Falls Power Company reports a net income 
of $928,000, or 16.1 per cent, last year as compared 
with 11.92 for the preceding year. 



/COALFIELDS in Routt county, Colorado, are to 
be developed upon a large scale, if the Yampa 
Fuel & Iron Company is successful in placing a 
bond issue in Europe. Representatives of the 
French and Belgian interests who are negotiating 
for the sale of $28,000,000 worth of bonds have re- 
cently been studying the situation in Colorado, and 
if the outcome is successful, a railway will be built 
from Hayden, Colorado, to Casper, Wyoming, and 
the exploitation of the coal deposits undertaken. 



"C'XTRALATERAL rights are discussed in a clear 
and informing way by Mr. John B. Clayberg 
in the California Law Review for May. "While many 
difficult points are made clear, it is perhaps sig- 
nificant of the inevitable legal maze that results 
from granting any such right, that even so experi- 
enced a practitioner confesses to doubt as to how 
the courts would rule on numerous important points. 
Possibly by the time all existing extralateral rights 
are adjudicated, the public will be educated to the 
point of abolishing them for the future. 



"pvUMMY directors will have a hard time of it in 
the future, if the ruling made by the Supreme 
Court of New York State holds good. A share- 
holder in White, Van Glahn & Company sued Mr. 
H. K. White, alleging that Mr. White, though know- 
ing the company to be insolvent, became a director 
(thereby facilitating the sale of stock through his 
reputation for wealth and business success), but 
allowed the affairs of the Company to be managed 
by others, with the result that a few months later 
it became bankrupt. The opinion of the court, con- 
curred in by all the justices, was that Mr. White 
was liable for the $50,000 lost by the shareholder 
who invested in the Company under the belief that 
it was being actively managed by Mr. White. This 
is a new ruling, but one that seems eminently sound. 
It is all too common that well known men allow 
their names to be used as bait to catch the unwary, 
and it is to be hoped that the establishing of legal 
responsibility for losses may act as an effective de- 
terrent. All too often, however, those who are so 
unwise have little beyond their reputations to lose 
in the ensuing maelstrom. 



88 



MINING AND SCIENTIFIC PRESS 



July 19. 1913 



Underestimating the Cost of Milling Plants — I 



By A. Sydney Additon 



Among the remarks commonly heard when sev- 
eral persons are discussing some new milling plant 
are: "I guess it is a good plant, but it cost about 
twice what they expected it to cost," "Yes, the plant 
is finished, but they will have to spend a lot more 
money on it before it is efficient," "Plants always 
cost twice what they are estimated to cost." Or at 
a directors' meeting, when a contemplated structure 
is under discussion and an estimate has been sub- 
mitted, some one will say : "Add 75% to that amount 
and you will come close to the actual cost, is my 
experience." 

Causes of Underestimating 

Why is this and why are such ideas prevalent? 
Often, of course, persons making such remarks are 
speaking without knowledge, but too often the ob- 
servations are true. Why should it ever happen that 
a plant estimated to cost $100,000 should cost 
$150,000? Misrepresentation, bad management, in- 
competency, ignorance, lack of technical advice, 
crooked business, and graft, are given as the reasons, 
and some or all of these may be assumed to cover the 
case. What is meant by such reasons, and how each 
of them acts to the end, is not as a rule clearly under- 
stood, as they are given off-hand, with but seldom any 
inquiry beyond. They are general reasons and, as 
general reasons, are largely true. They would be 
reasons for failure in any business enterprise. Ex- 
actly what happens to cause the cost of a given 
structure to exceed original estimate is not com- 
monly clear. 

For elucidating this point and supplying data 
which may aid engineers and managers to escape 
falling into the clutches of the underestimated cost 
bugaboo, I have studied the matter in considerable 
detail, and some of the results of this investigation 
follow. The discussion is confined wholly to mills 
and milling operations, and it is assumed that the 
mine work in each case is satisfactory and in no way 
affects the topic under discussion. At one property 
I visited, a new stamp-mill and cyanide plant had 
recently been constructed and were running smooth- 
ly and giving satisfactory results. The arrange- 
ment of certain parts of the equipment being pe- 
culiar and differing from the usual practice, led me 
to inquire the reason. This question brought out 
the history of the construction of this plant, which 
had cost 41% more than the original estimate sub- 
mitted to the directors- of the company at the time 
they voted to build. This history, while by no means 
unusual, throws much light on our inquiry. 

History of One Undertaking 

To begin at the beginning, this property was 
owned by a group of clever, conservative, well-to-do 
business and professional men, all of whom believed 
in doing well and thoroughly everything they 
undertook to do. They all realized that it cost 
money to develop and equip a mine, and were ready 



to meet contingencies. They were the right sort; 
men for whom an engineer or other employee would 
do his best. They had purchased the property in 
an undeveloped state, and immediately started to 
find a competent reliable man to develop it for them 
either into a producing mine or to the point of aban- 
doning the venture. They took their time in making 
a selection of the engineer, realizing the importance 
of this first step, and finally succeeded in securing 
the services of just the man needed. This done, they 
supplied the funds and told him that it was up to 
him to make a mine or advise them to quit. He had 
their entire confidence and was given a free hand. 

Under these favorable conditions the development 
of the property was rapid, the vein was well opened 
and ore found to be of workable grade was blocked 
as fast as developed. The superintendent cautioned 
the company against thinking of a milling plant too 
soon. But after a couple of seasons of this well 
directed development, the time came when the super- 
intendent advised the construction of a plant, re- 
porting at the same time the exact condition of the 
mine and ore reserves. All of this was most pleasing 
to the directors, and much deserved praise was given 
the superintendent. They then instructed him to 
submit to them estimates of the cost of such a plant 
as he considered advisable. 

Machinery Houses 

The superintendent immediately took up the mat- 
ter with three well known machinery dealers, whose 
representatives visited the mine, and, in due course 
of time, each house submitted to him plans, specifica- 
tions, and estimates of cost of the plant that the 
representative decided was best suited to the re- 
quirements. These plans and estimates were gone 
over carefully by the superintendent and some 
of the officials of the company. Affer many consulta- 
tions and, needless to say, many visits from ma- 
chinery house representatives, lunches at the club, 
and so on, a selection was made, and contracts 
signed. The elation due to the knowledge that they 
had a good, proved mine, well developed, with 
quantities of ore, together with their confidence 
in the superintendent, and the clear understanding 
the 'representative' seemed to have of their needs, 
shut from the view of the officials of the company 
the vision of anything but a successful plant. The 
machinery house furnished working drawings and 
an estimate of the cost of construction. Everything 
was most satisfactory to all concerned. The super- 
intendent rushed the preliminary work, machinery 
was delivered, money paid, and construction soon, 
under way. Exit joy, enter gloom. 

In carrying on the construction, according to 
plans, it was found that the labor costs at each 
stage of the work were considerably in excess of 
the estimate given by the machinery house, due to 
conditions, such as the kind of labor available, 
which were not important factors in making the 



July li>, l l J13 



MINING AND SCIENTIFIC PRESS 



S'J 



intimate. The aniouut uf luatcriul tliut had to bo 
purchuscd ituriiig the construction was ulso surpris- 
ing; not equipment, but all sorts of miscellaneous 
items, such as iron, lumber, nails, hose, wheelbar- 
rows, track, and tools, besides materiul and equip- 
ment for an incline with which to handle the ma- 
chinery to its proper site. All of these things made 
quite un additional amount of money necessary. 
As the plant ncared completion, a metallurgist was 
employed to be its superintendent, and a crew was 
selected. All was ready and started, everything 
seemed to go smoothly, and all hands were jubilant. 
The added cost for labor and material during con- 
struction was forgotten. The next day the local 
newspaper announced that "The new up-to-date 
milling plant of the • • • Mining Company 
was put into commission yesterday, and its oper- 
ation was found to be perfect from the start. This 
plant has a capacity • • •," etc. I might here 
note that the metallurgist who had been employed 
as mill superintendent was not entirely satisfied 
with certain parts of the plant, but said nothing, 
as he needed the job and knew that it would work 
itself out. 

Ore-Bin Difficulties 

At the end of the second day the mine foreman 
reported that he could not put the amount of ore 
into the bin that he was instructed to deliver each 
day. The mill superintendent was questioned, and 
during the succeeding days he tried in every way 
possible to increase the capacity. Finally, at the 
end of two weeks, it was decided that the maximum 
had been reached, 30% less than what the plant 
was designed to do. The first blockade was at the 
regrinding mill, after the battery. The machinery 
house was appealed to and sent a man up to in- 
vestigate, one who was able to sell machinery. First 
an attempt was made to make a second classifica- 
tion below the battery, so as to send a portion of 
the oversize to the tube-mill direct, with the idea 
of relieving the regrinding machine. This meant 
telegraphing for another cone to be sent by express. 
(Yes, it happened that there was sufficient height 
to get this in.) 

Changes in the Mill 

After the necessary tearing out of frames, and 
making of launder and plumbing connections, the 
cone was tried, but proved of but little help, and 
the amount of water added to the pulp in trying 
to separate a product for the tube-mill from the 
flow that should have gone to the regrinder was 
not small. It was clearly 'up to' the regrinder, 
and the man was forced to admit, not that the 
machine was not doing work up to its rated capac- 
ity, but that a much larger amount of pulp was 
going to it than was expected when the plant was 
designed. The ore was harder than had been real- 
ized, and too small an amount was crushed fine in 
the battery. Nothing for it but another regrinder. 
"Too bad, but one cannot always tell how ore is 
going to crush." The regrinder was ordered at 
once by wire from the East. Meanwhile, the plant 
was to be operated at the limited capacity. The 
crew must necessarily remain the same, hence the 



coat of milling was increased i'.i'/i , amounting to 
$1827 per month, or $4575 f r the 75 days before 
this new mill could be received and installed. 

Fortunately, the superintendent inquired about 
the power necessary for this new mill and found 
(hat the motor which was driving the present re- 
grinder, and some other equipment, was already 
fully loaded. Either a separate motor must be 
put in for the new mill, or the present one taken out 
and a larger one put in its place. The latter course 
was adopted, and by the time the new mill arrived, 
the new motor was installed on a new foundation 
with new transmission arrangements. The only 
place that this new regrinder could be placed was 
outside of the building, so it was necessary to re- 
move a portion of the wall, make an excavation, 
build a lean-to addition to the building, put in foun- 
dation, and increase and alter the water service. On 
account of the distance that this placed the mill 
from the discharge of cones, the launders had to 
be reconstructed and the second cone thrown out. 

Tank Changes 

While running at the reduced capacity, waiting 
for the new regrinder, something went wrong with 
the vacuum pump, and it became necessary to stop 
the filter for a day to repair the pump. When the 
filter stopped, everything had to be shut down, all 
the way to the top of the mill, as no pulp-storage 
tanks had been provided. To provide against such 
delays in the future, two pulp-storage tanks, fitted 
with agitation appliances, were ordered at once and 
installed. In placing these tanks after the agita- 
tors, there was, of course, insufficient head room 
between the discharge of the agitator and the top 
of the settlers, hence it was necessary to provide a 
centrifugal pump to lift the stored pulp to the 
required height. There being no room in the build- 
ing, or on the grades, for these large tanks, it was 
necessary to make a special excavation beside the 
building and build a retaining wall and founda- 
tion. This work was not foreseen at the time the 
material for the alterations to accommodate the 
new regrinder were ordered, consequently another 
less-than-carload order of cement and lumber was 
placed. A new motor for the agitators, altera- 
tions in plumbing, electric wiring for power and 
lighting, gangways, steps, and walks were all nec- 
essary. 

Additional Equipment 

When the new regrinder was installed, the capac- 
ity was run up to that originally proposed without 
difficulty. The classifier was the next point of 
trouble. It had not been handling the product quite 
as satisfactorily as desired, but now that the added 
load was put upon it, it became literally buried. 
It was not suited to the work and had not suffi- 
cient capacity. The question of adding another or 
throwing it out and putting in one of different 
design was decided in favor of the latter. This 
was ordered and installed. Meantime the plant was 
again being operated at limited capacity. The new 
installation involved, of course, another lot of alter- 
ations to power, lighting, water, and launder serv- 
ice. At this time the metallurgist in charge of the 



-JO MINING AND SCIENTIFIC PRESS July 19, 1913 



mill determined that a good extraction could not 
be maintained if the time of agitation were short- 
ened. With the capacity of the plant increased, 
this would be necessary, unless another agitator was 
added to those in use. (Note that the metallurgist 
had been employed at the time the plant was ready 
to run, but had been given no chance to determine 
such points in advance.) So in order to avoid fur- 
ther disappointment and delay, an additional agita- 
tor was wired for. This required an additional 
amount of air, which the compressor could not de- 
liver. A new compressor was therefore ordered, 
with a new motor to drive it. All of, this called 
for a deep excavation for the new agitator, addi- 
tions to the building, a retaining wall and founda- 
tions for agitator, compressor, and motor, and also 
alterations in the air, water, and lighting service, 
and in gangways and walks. More less-than-carload 
freight shipments, and an additional 30 days' oper- 
ation of the mill at limited capacity were necessary. 

Precipitation Department 

The precipitation department was nearly efficient. 
Clarifying tanks had been installed to save the cost 
of a clarifying press, and the results secured were, 
however, more or less unsatisfactory. This led to 
the purchase and installation of a press for the 
purpose. I understand that the metallurgical com- 
pany that supplied this precipitating plant will not 
now guarantee satisfactory results unless a clarify- 
ing press is used. This is good, and will save added 
costs in this department. The amount of solution 
to be handled in the plant had been greatly under- 
estimated, if estimated at all, and when the plant 
was brought up to its capacity this was keenly felt. 
In fact, it so handicapped the cyanide department 
that four additional tanks were installed to give 
sufficient storage capacity. This also necessitated 
another pump and a pipe-line to storage tanks at 
top of plant, and called for additional alterations 
in the power service and circulating system. 

After all these alterations had been made, the 
increased tax upon the power service necessitated 
the purchase of a transformer. Other smaller items 
that had also to be supplied were : laboratory equip- 
ment, report and testing-room fittings and tools, 
and utensils and appliances for use of the crew. All 
of this was not done as easily and simply as it 
reads, as the reader will know from experience, but 
days were spent trying to make parts do their duty, 
scheming to overcome troubles, telegraphing for 
prices, and placing the stock. Also much loss of time, 
grief during the making of alterations, and losses 
of material which cannot be easily estimated. After 
four and a half months — which, by the way, was 
a short time, considering the various troubles, the 
plant was at last ready to handle its estimated ca- 
pacity in an efficient manner. The additional cost 
over and above the original estimate was $49,519. 
This total was made up of the following items : • 

Additional labor for construction made as per plans. $6,732 

Additional cost of material as per plans 5,270 

Additional freight and hauling of this material 904 

Cost of supplies used during construction 2,240 

Equipment, material, and labor for necessary acces- 
sories 2,185 



Equipment, material, and labor for surface incline. . 1,373 

Purchase and installation of cone classifier, with its 
attendant costs, and subsequent tearing out of 
same 180 

Purchase and installation of new re-grinder, includ- 
ing excavations, building, foundations, and al- 
terations 3 > 690 

Purchase and installation of new motor, on account 
of additional power required for re-grinder, 
foundations, and alterations 620 

Purchase and installation of pulp-storage tanks, in- 
cluding pump, motor, pipe and fittings, excava- 
tions, building, foundations, and alterations 2,420 

Purchase and installation of new classifier, includ- 
ing removal of old one, foundations, and al- 
terations 980 

Purchase and installation of new compressor and 
excavations, building, foundations, and altera- 
tions l.° 10 

Purchase and installation of new compressor and 

motor, Including foundations and alterations... 1,440 

Purchase and installation of clarifying press, includ- 
ing foundations and alterations 2,860 

Purchase and installation of additional solution 
tanks, pump, and pipe-line, including excava- 
tions 680 

Purchase and installation of new transformer 720 

Purchase and installation of laboratory equipment, 

tools, and appliances 600 

Freight and hauling on above new equipment and 

material 3 > 615 

Added cost of operating expense for 4H months, 

due to limited capacity 8,540 



$45,959 



The difference between this amount and the actual 
added cost, as noted above, or $3560, was made up 
of miscellaneous items of which no detailed account 
was kept, such as: telegraphing, express charges, 
traveling expenses, added office expenses, and ex- 
perimenting. There should also be added the loss 
of the use of the money not produced, due to the 
30% curtailment of the output for the four months 
and a half. 

Total Cost 

The total cost, then, was about 41% greater than 
the original estimate. This does not necessarily 
mean that the plant cost 41% more than it should 
have cost, but 41% more than the amount of money 
the company was advised it would cost and had 
arranged to have on hand to pay. It is quite an- 
noying for a board of directors to be obliged to 
notify the stockholders every 30 days that more 
money is needed for construction work and at the 
end to realize that they have spent 41% more than 
they said they would. In this particular case there 
was no further embarrassment after the first call 
for additional money, as the profits from the oper- 
ations at limited capacity amply covered the added 
cost. This good fortune does not, however, alter 
the seriousness of the underestimate, as many times 
this would not be the case. It may be added that 
where the excess cost is paid out of profits made 
during the operation of the inefficient plant, less 
attention is paid to the fact that excess cost was 
incurred, thus helping to keep it from public notice. 
But at the same time it indicates the underlying 
reason for the remark of a director, given above : 
"Add 75% to that amount and you will come close 
to actual cost, is my experience." 



•July 1912 



MINING AND SCIENTIFIC PRESS 



Cuiise of the Trouble 

Having gone over tin- chief details nf the histon 
of this plant, the question at ouee presents itself, 
where did 'gloom' Hrst enter f What was the cause 
of all this trouble? Tin- answer is easy, and 1 only 
fear my inability to state it strongly enough to 
make the faets clearly understood and appreciated. 
The first error was made when the superintendent 
"rut to machinery dealers to buy a plant, instead 
of taking to them a complete set of specifications 
of what was wanted and asking them for bids. The 
point is this: When a buyer goes to a machinery 
house and tells them that he wauts a first-class mill- 
ing plant, of a certain daily capacity, giving them 
all the details possible of treatment required, the 
machinery dealer will prepare a set of plans and 
specifications, including as little equipment as will 
assemble to the appearance of a plant of the capac- 
ity desired. The buyer generally expects the dealer 
to put in every sort of thing possible in order to 
make the sale greater. As a matter of fact, they 
cut out everything they can possibly omit in order 
to quote as low a price as possible so as to get 
the order. You might buy the plant somewhere 
else, or not at all. if the price seems too high, but 
once you buy and install what they have specified, 
you will have to buy what the plant lacks later; 
their whole aim being to 'land' your order. They 
have no responsibility in the matter beyond supply- 
ing first-class specified equipment. They are not sell- 
ing you a plant guaranteed to handle so many tons 
of your ore per day, making a certain percentage 
of recovery or profit, but they are simply selling a 
specified list of equipment. All efficiency and ca- 
pacity' statements are made by 'selling' engineers, 
or trade catalogues, and the firm's authorized sig- 
nature will not be found signed to anything in 
the way of a guarantee, except the contract to sell 
certain specified machinery (of first-class workman- 
ship and design) at a certain price and upon cer- 
tain terms. Their principal concern is to leave out 
enough items to enable them to make their price 
lower than the other bidders, and at the same time 
specify enough to make the proposal look like com- 
plete equipment to the purchaser. There is a happy 
medium here which must be struck, and the expert- 
ness with which a machine salesman can do this 
measures his worth to his firm. 

Position of Machinery Houses 

It might be thought that the machinery business 
would be injured by such methods, but they all do 
it, and, no matter how conscientious a firm desires 
to be, they know that other firms will proceed in 
this way, and therefore they must, or not expect 
to secure the business. In the second place, it is 
easy enough to slide out of any responsibility not 
really assumed, cover their designs or intentions, 
and actually make the purchaser their friend by 
ready and willing assistance in securing the addi- 
tional equipment needed. Persons who buy plants 
in this way rarely buy more than one, in any case. 
In the case under consideration, when it was found 
that the regrinding mill had not sufficient capacity, 
the claim that the ore did not crush as easily as 



expected seemed plausible as well us probable. 

Placing the Blame 

Was it the fault of the superintendent J No, nut 
exactly. When this man was employed, he was 
secured as the best man obtainable to develop the 
mine. He was not supposed to be a metallurgical 
engineer, and his knowledge along this line wns 
superficial. He had not spent his life in designing 
and constructing milling plants, but in finding and 
developing ore. When it came time to build the 
plant, everyone was jubilant over success; this man 
had made good. The building of the mill did not 
appear to be anything to 'stump' him, especially 
when all the machinery houses were ready to help 
with advice and experience. The fault was with 
the directors of the company in not being as careful 
in beginning the milling business as they had been 
in starting the mining business. Had they had 
plans, specifications, and estimates carefully pre- 
pared by an experienced metallurgical engineer, no 
such annoyance would have occurred, no time would 
have been lost after installation, and the completed 
plant would have cost much less than the excess 
cost of the present one. 

Conclusion 

Some of my readers will doubtless think I am 
trying to score the machinery dealers, but this is 
not the case. Machinery dealers are the friends 
of mining operators and especially of metallurgical 
engineers ; from them the engineer secures quanti- 
ties of data and much assistance. Were they not 
friendly with each other, and did they not work to- 
gether, supplying each other with information based 
on experience and practice, it would be indeed dif- 
ficult to prepare a correct estimate of a piece of 
work. I have merely given the history of this par- 
ticular mill as an example of one way in which 
excess cost occurs, and have stated the reasons given 
because they are true and, if personally understood, 
reflect in no way upon machinery dealers. I do not 
wish to be understood as blaming the machinery 
houses for methods they are plainly forced to adopt, 
but I certainly would be glad to see conditions 
changed so that such methods need not be pursued. 
Machinery houses much prefer to tender a bid on 
a full set of specifications rather than to deal with 
buyers as in the above case. When specifications 
are prepared, really competitive bids can be se- 
cured, the machinery houses are saved much un- 
necessary expense, and everybody is better pleased. 
A machinery dealer prefers to stick to his own busi- 
ness, that of manufacturing and selling machinery. 
Going to a machinery house to buy a milling plant, 
as in the case cited, is like going to a sawmill to 
buy a house. Submit specifications to the dealer 
and ask him his price in either case, thus doing 
away with the conditions which force him to do 
business in the manner described above. I suppose 
the time for this will never come, but if every ma- 
chinery house would refuse to bid on a milling plant 
without having the buyer's own specifications to 
go by, this cause for excess cost would be elimi- 
nated. 



92 



MINING AND SCIENTIFIC PRESS 



July 19. 1913 



The Symmes Agitator 



By Whitman Symsies 



In sequence of the article by Jay C. Carpenter in 
the Mining and Scientific Press of May 3, it may be 
of further interest to metallurgists to have a de- 
scription of my solution of the flat-bottom agitator 
problem. The results which Mr. Carpenter obtained 
are excellent, and quite remarkable. But in the 
operation of the Trent agitators at the West End 
mill, he was dealing with a much simpler ore than 
that being cyanided in the Mexican mill. This ore 
contains heavy lead, zinc, and iron sulphides, and 
treating without concentration, a much stronger 
agitation than that described by Mr. Carpenter is 
required, both for the solution of the silver and gold, 
and keeping the ore in suspension. For example, 
when Trent agitators were in the Mexican mill, it 
was impossible to start them, when they got stuck, 



treated. An arrangement of Pachuca agitators, 
transferring to the Dorr thickeners, and receiving 
pulp from %hem, would have been inconvenient, be- 
cause of the different elevations of the agitators 
and thickeners respectively. Therefore, it was de- 
sired to retain the flat-bottom vats, for metal- 
lurgical reasons as well as for economy in the 
alterations. At that time, the Dorr agitator was not 
upon the market. I knew of no agitator which 
would meet our requirements; and so it became 
necessary to devise one. 

A Perfect Agitator 

A perfect agitator should be capable of giving as 
strong or as weak agitation and aeration as any 
pulp requires; it should have no wearing parts in 




VIEW SHOWING TOP OF VAT FITTED WITH SYMMES AGITATOR. 



by the simple expedient of forcibly reversing the 
arms, as described by Mr. Carpenter. Indeed, the 
ore packed so solidly in the bottom of the vat, 
that the arms could not be made to clear themselves, 
even when the vat was emptied to within a few 
feet of the bottom, and men took hold of the arms 
and attempted to move them. Collars were always 
fixed to prevent the arms from rising, and conse- 
quently there was no trouble from that source such 
as Mr. Carpenter describes. At first there were 
steam coils in the vats, but scales of baked clay, 
from the crust formed on the pipes, would choke 
the nozzles, and consequently live steam had to be 
substituted for heating. I do not think that anyone 
could have given the Trent agitators a fairer trial 
for continuous agitation oP the Mexican ore, than 
they received under the supervision of the mill su- 
perintendent. Charles R. Morris. Mr. Carpenter 
does not refer to any device, or to any method which 
was not tried there. The time lost in the mill, due 
to the Trent agitators, was in hours as follows: 
March. 1912. 28.6: April, 57.5; and May, 46.8. 

In the Mexican mill it was necessary to change 
solution during the cyanide process, on account of 
the high tenor and baseness of the pulp being 



the pulp itself; it should not be subject to inter- 
ference or injury by settlement or packing of the 
pulp ; and all parts should be readily accessible from 
the outside of the vat. To meet these conditions 
for a flat-bottom vat. I devised a machine consisting 
of a number of air-lifts, flexibly suspended from a 
horizontal revolving arm. In the Mexican mill these 
are supported from an arm on a standard, fixed im- 
movably in the centre of the vat. and on account of 
the space available beneath each vat. the driving 
gear was placed there. The revolving arm could 
just as easily be suspended and driven from above, 
if the vats had been resting on the ground, and de- 
signed for operating by that method, if required. 
The agitator can be easily understood from the 
illustrations. The only parts beneath the pulp 
that require any attention are the air nozzles. These 
are protected with rubber sleeves, as in a Pachuca. 
to prevent a flow of pulp into the air-pipe, when 
the air-supply is interrupted. The air-lift tubes hang 
from the revolving arm by means of chains, and are 
so balanced as to remain vertical when the arm re- 
volves, which in the Mexican mill is at the rate of 
1.5 r.p.m. Air is supplied to each tube by a hose, 
connected with a pipe-union above the pulp. In the 



July lit, I'M ; 



MINING AND SCIENTIFIC PRESS 



event that the pulp become* packed on the bottom 
of the vut, the air-lifts will drag, and cut their way 
down through it. A rod, rising from each tube, in- 
dicates whether the tube is in a vertical position, or 
is dragging. If power should be off for a long time, 
the air-lift tubes can be raised by means of the 
chains, and then, by being lowered a few links at a 
time, will cut their way down to their normal posi- 
tion near the bottom of the vat. For agitating a 
vat while it is being filled or discharged, when the 
air-lifts are unable to operate, a second air-pipe can 
be carried down alongside of each air-lift, and air 




FLAN OF SYMMES AQITATOR. 



may thus be blown into the partly filled vat, but in 
the Mexican mill the continuous system of agita- 
tion is in use, and these extra pipes are not needed. 
The amount of compressed air used by each air- 
lift is regulated by means of a needle-valve above 
the connection, and for this purpose the attendant 
• can walk along the trussed beam while it is revolv- 
ing. The suspended air-lifts can be easily lifted out 
of the vat for inspection, by merely disconnecting 
the air hose at the union, and then lifting the chains 
off the hooks. There are no flange connections be- 
low the level of the pulp, to be cut by action of the 
moving pulp, and thus made to leak, as in the Trent 
and some other types of agitators. There are no 
valves necessary to hold the pulp in the vat, while 
making repairs to pumps or pipe-lines, and which 
valves, having been cut by the moving pulp, are 
generally found to leak badly. There are no pumps 
to pack and to repair. 

The Agitator at the Mexican Mill 

The first agitator of the above description started 
operation in the Mexican mill on August 30, and the 
second and third were started on November 20, 
1912. They are still in operation, and the crushing 
and grinding department of the mill has never lost 
any time on their account. They have never been 
shut down except when the power was off, or when 
the air-lifts have been lifted out to inspect the con- 
dition of the rubber sleeves, which is done about once 
a month. They have never required any repairs 
whatsoever, excepting new rubber sleeves. When 
the first agitator was substituted for the Trent, its 
superior agitating power was at once apparent. 
No. 1 Trent had been filled with pulp sampling about 



irl2, and discharging it at ft! per ton. The now 
agitator took tho pulp at il2. and discharged it at 
♦4. The following figures show the improved ex- 
traction, other conditions being the same in both 
eases. 

Thk.nt Auitatom 









Further extrac 








tlon possible 






Tailing. 


by agitation. 


June 






10.23 


July 


1912 




0.26 


August 






0.20 






Symmkh Aqitatobh 










Further extrac- 








tion possible 






Tailing. 


by agitation. 


.March 


1913. , 


$1.67 


$0.03 


April 






0.02 


May 


1913 


1.30 


0.04 



The undissolved metal of value is practically all 
silver. 

Details of the Agitator 



The agitator tanks are 24 ft. diam. by 14 ft. deep. 
The power consumed by each of the three Trent 
agitators, for the pumps alone, averaged 6.31 hp. 
The power consumed in turning the revolving arms 
of each of the new agitators is less than 0.5 hp., 
and the compressed air used is equivalent to about 
4.5 hp. at the motor which drives the compressor. 
The latter is a Sullivan, 18 in. diam. by 12-in. stroks, 
built without a water-jacket, and supplying air at 
12 lb. pressure. It is operated at a speed of 93 r.p.m., 
and supplies all the compressed air used in the mill, 
for operating three air-lifts, a 16-ft. Oliver filter, the 
three new agitators, and a No. 525 Steel-Harvey 
crucible furnace. The compressed air consumed by 
the agitators, measured by an Excelsior air meter, is 




SECTIONAL ELEVATION OF SYMMES AQITATOR. 



as follows: pulp, 1 ore to 2 solution, with air 8, 12, 
and 15 lb. pressure, consumed 29, 80, and 94* cu. ft. 
respectively, while with 1 ore to iy» solution, with 
same air pressure, consumed 30, 74, and 89 cu. ft. 
respectively. The agitators are ordinarily working 
with air at 12 lb. pressure or less, and their average 
consumption is 60 to 70 cu. ft. of free air per minute. 
The amount of air required depends upon the vio- 
lence of the agitation which the pulp demands, in 
order to obtain a complete extraction, and does not 
depend upon the agitator itself. In one test the 



94 



MINING AND SCIENTIFIC PRESS 



July 19. 1913 



pulp was thinned to 1 ore to 3 1 /-; solution, and agi- 
tated with only 17 cu. ft. of free air per minute at 
8 lb. pressure, without there being any settlement 
of the pulp to the bottom of the vat. No difference 
was noticed in the operation of the agitator when 
th"e melting furnace was drawing upon the air sup- 
ply, and probably they could be operated with less 
air than at present. The agitators require less at- 
tention than any other machinery in the Mexican 
mill, and except for a slight alteration of the 
piping, which has since been devised, they appear to 
be as near perfect as it is worth while trying to get. 
The power has been off for 5 hr. 40 min.. and they 
started without any trouble. It has never as yet been 
necessary to raise or lower the air-lifts in order to 
have them cut their way back to the bottom of the 
vat, and as the indicating rods have not been of 
any particular use, it is doubtful if they are really 
necessary. After stoppage, the air-lifts seem to start 
the agitation by dragging and by cutting their way 
by means of the induced flow. They appear to be 
better than the Dorr agitator, in that they have no 
rakes to be buried in the pulp. I infer this from 
the similarity of the Dorr agitator to the Dorr thick- 
ener, and know that, in the latter, the spider can 
be broken by settlement of the pulp, owing to lack 
of attention. Furthermore, our agitators make use 
, of the full capacity of the vat. I believe that they 
are in every way as good as Pachucas, with the ad- 
ditional advantages of a less first cost, of an abso- 
lute freedom from interruptions of the agitation, and 
the possibility of a cheaper and more convenient 
arrangement in connection with the now almost uni- 
versally used Dorr thickeners. 

Section 10 of the Mines Act of 1907. of Victorias 
Australia, provides that any water or sludge pro- 
duced from or consequent to any mining operations, 
and discharged into any watercourse, lake, or 
reservoir, shall be deemed to pollute or injure the 
same if such water or sludge, at the point where 
it leaves any claim or any land comprised in a 
lease, or any land used in connection with any such 
mining operations, by or in any respect under the 
control of the person carrying on the same — (a) con- 
tains any poisonous matter in the total proportion 
of more than 50 gr. to 1 gal., or any noxious mat- 
ter in such quantity as to be injurious or detrimen- 
tal to the public health ; or, (6) holds in suspension 
or solution any earth or mineral, or any earthy or 
mineral substance in the total proportion of more 
than 800 gr. to 1 gal. A watercourse includes river, 
stream, watercourse, waterway, creek, or gulch, and 
in each case whether water flows therein perennially 
or intermittently. 

The? Buffalo Star dredge, Bright district, Victoria, 
Australia, handled 377,519 cu. yd. of gravel in 1912 
yielding about $42,000 in gold. This was from a 
depth of 33y2 ft. The company has re-soiled about 
2330 sq. yd., about % acre of dredged ground, by 
carting soil from ahead of the dredge and spread- 
ing it from 15 to 18 in. deep on the tailing from 
the dredge. In December last the oat crop was 
4 ft. high, cutting equal to two tons of hay per 
acre, or 60 bushels if thrashed. 



Diamonds and Other Gems Mined in the 
United States 

Gems and precious stones were produced in the 
United States in 1912 to the value of .$319,722, ac- 
cording to Douglas B. Sterrett, of the United States 
Geological Survey. The kinds of precious stones 
found in the United States are many, ranging from 
diamonds of fine quality to low-grade stones such 
as agates, but, as is seen from the total value of 
the output, there are no really large operations. 

The principal gem mineral mined in the United 
States during 1912 was Montana sapphire, of which 
there was a large output for use both as gems and 
in mechanical applications. The greater part of 
the gem sapphires came from the mines in Fergus 
county, where they occur in a rock matrix. The 
majority of these stones have the true sapphire-blue 
color. The bulk of the sapphire for mechanical use 
came from the placer deposits in Granite and Deer 
Lodge counties and consists of varicolored stones. 

The development of the opal deposits of Hum- 
boldt county, Nevada, was attended with much suc- 
cess, and a quantity of magnificent gem material 
was obtained. The opal is of an unusual type, con- 
sisting of dark translucent mineral with a variety 
of rich colors. The deposits promise to supply a 
gem equal if not superior in beauty to the opal 
from Australia. 

Prospecting and mining at the emerald mine in 
North Carolina were attended with only partial suc- 
cess. Two pockets or deposits of emerald were re- 
moved during the year; other developments con- 
sisted mainly of exploratory work, which has con- 
tinued into 1913. 

The tourmaline output of southern California was 
small, but some magnificent specimen crystals were ■ 
obtained. Especially fine gem crystals of kunzite 
were found and brought good prices. The produc- 
tion of turquoise was very small compared with 
some previous years. Beautiful amethyst was found 
in Warren county, North Carolina, and some fine 
gems have been cut from sample crystals. A few- 
fine specimens of golden beryl were obtained from 
prospects in Alexander county, North Carolina. 
Beautiful gems were cut from some of these. The 
production of agate and associated varieties of chal- 
cedony was again large in several Western states. 

No great advances are reported in diamond min- 
ing in Arkansas during 1912. 

Several dozen diamonds were found and several 
diamond-washing plants were constructed for oper- 
ation in 1913. 

It has been practically impossible to determine 
the quantity and value of the diamonds found in 
the Arkansas field since the first discovery in Au- 
gust 1906. Most of the stones are still held by the 
mining companies and few have been sold. It is 
estimated from the figures furnished the Survey and 
from reports in the press and those furnished by 
private persons that about 1400 diamonds, weighing 
nearly 550 carats, have been found from August 
1906 through December 1912. The total estimated 
value placed on this output in these reports amounts 
to $12,108. 



July 19. IBM MINING AND SCIENTIFIC PRESS 95 

Geology of the Kalgoorlie Goldfield II 

By Malcolm Maclarbn and J. Allen Thomson- 



General Geology and Geological History 

The area here briefly described lies between the 
1-lst and 122nd meridians of east longitude, and 
between 30° 30' and 31° 05' 18" south latitude, be- 
ing approximately 40 by 59 miles and containing 
2375 square miles. A general grouping of the rocks 
and deposits of the region may be made, in order 
of increasing age. as follows: 



GEOLOGICAL MAP OF WESTERN AUSTRALIA. 

(a) Recent and Pleistocene: 

Drift sand, salt and gypsum (kopai) beds, 
calcareous cements, laterite (ironstone), kao- 
lin clay ('pug'), magnesite deposits, alluvial 
'wash', and valley and lake deposits in gen- 
eral. 

(b) Pre-Cambrian : 

1. Younger granite and quartz-porphyry. 

2. (a) Younger Greenstones: serpentine, talc- 

schist, gabbroid rocks, coarse am- 
phibolite, epidiorite, quartz-dolerite 
greenstones, 
(b) Porphyrite and felspar-porphyry. 

3. Sedimentary Beds: shale, chert, quartzite, 

and conglomerate. 

4. Older Greenstones: fine-grained amphibo- 

lite, calc-schists. 

5. Gneissic granite (not as yet known in the 

region). 

From the foregoing it will be apparent that there 
are essentially two rock groups: (a) a pre-Cambrian 
rock complex ; (6) the denudation under desert con- 



ditions of that rock complex. The former is of 
chief concern. 

A small-scale map of Western Australia would 
show the rocks of the area in question as a com- 
paratively narrow band of greenstones, striking 
X.N.W.-S.S.E. in a wide area of granite. The band 
is widest from Coolgardic through Kalgoorlie to 
Kurnalpi, a distance of 75 miles; to the north and 
south there is an appreciable diminution in width, 
the greenstones indeed bifurcating northward (north 
of Broad Arrow) into two big narrow parallel belts. 
These changes are not, however, appreciable with- 
in the area here discussed, which indeed is almost 
entirely occupied by the greenstone complex, and 
shows only small areas of the enclosing granite near 
Coolgardie on the west, near Black Flag on the 
north, and at Juglah on the east. East and west 
of the area the granite outcrops for many miles. 

Dealing then with the greenstone complex, the 
known rocks may be separated into three main 
groups: Older Greenstones; Sedimentary Beds; and 
Younger Greenstones, with which are associated 
porphyrite and porphyry dikes. The internal re- 
lations of these are naturally exceedingly obscure 
on the amount of mapping done, and it is certain 
that more detailed work would effect considerable 
local modifications. 

Older Greenstones 

The Older Greenstones together with the ancient 
sedimentary beds occupy the major portion of the 
area. The former are mainly fine-grained amphib- 
olites, with allied or more probably derivative 
rocks generically termed calc-schists. Both names 
have only a general significance and give no clue 
to the original character of the rocks; an amphibo- 
lite is merely a hornblende-bearing rock and a calc- 
schist an indefinite rock characterized by abund- 
ance of secondary carbonates, as dolomite and sider- 
ite. They form in the field low, long, and broken 
ridges, which yield low swelling knolls, a physi- 
ographical form fairly characteristic of these rocks. 
Their weathering yields a talus of small rectangu- 
lar fragments, which break with an approach to 
conchoidal fracture. Future more detailed mapping 
should reduce the area allotted to the Older Green- 
stones, since they have been utilized to embrace all 
doubtful or insufficiently examined rocks; they will 
in their reduction yield nothing to the sedimentary 
beds, but a great deal to the Younger Greenstones. 
Little may be said concerning the original nature 
of the rocks grouped as Older Greenstones; they 
may have been tuffs and ashes, or they may have 
been lava flows. It seems reasonable to regard 
them as representing alternations of lavas and 
ashes, the former furnishing the fine-grained am- 
phibolites, the latter the calc-schists. The Older 
Greenstones are perhaps most typically developed 
in the great bands east of Kalgoorlie, for the broad 
western band at Coolgardie has been so altered by 




96 



MINING AND SCIENTIFIC PRESS 



July 19, 1913 



the intrusion of the younger granite that it has 
lost many of the characters of the original zoisite- 
amphibolite (a hornblende rock characterized by 
the presence of the mineral zoisite). 

Sedimentary Beds 

In the absence of direct evidence of the nature 
of the Older Greenstones it is impossible in a time 
classification to separate from them the ancient in- 
dubitably sedimentary rocks of the area. The lat- 
ter present a normal cycle of sedimentation rang- 
ing from coarse conglomerates to fine muds. They 
are best developed in the neighborhood of and to 
the south of Kurrawang; they will therefore hence- 
forth be collectively termed the Kurrawang series. 
Between Coolgardie and Kalgoorlie the sedimentary 
beds are eleven miles broad across their strike ; they 
run north-northwest across the low ground of the 
Kurrawang lakes, and pass some distance west of 
Black Flag. To the south they are lost in low lake 
country, and do not appear to pass beyond the great 
Mt. Monger thrust plane. 

The series is well exposed in a long line of so- 
called 'breakaways' that lie on the edge of the 
'lake' bed about two miles south of the main Kal- 
goorlie-Coolgardie road between Binduli and Kurra- 
wang. The sediments remain above the lowest sur- 
face levels only with difficulty and only when they 
have been strengthened by ribs of conglomerate or 
by dikes of intrusive acid rock ; the finer-grained 
rocks are therefore rarely seen and are ordinarily 
covered by lake deposits and by wind-blown sand. 
The conglomerates or 'boulder beds' — the latter is 
the better appellation — are only sporadically distrib- 
uted through the sediments, and their appearance 
is reminiscent of the scattered beds of conglomerate 
of a great river valley, as that of the Brahmaputra, 
the individual beds being thin and soon running out 
to a feather edge. Their greatest development is 
in the high ground immediately southeast of Kur- 
rawang, where they occupy the ridges and run as 
far south as Red lake. On the same strike they 
reappear to the north of the broad low Kurrawang 
valley in the ridges immediately west of the Black 
Flag lake. They are here and near Kurrawang com- 
posed chiefly of pebbles of quartz, quartzite( ?), jas- 
peroid rocks (often banded), and albite-porphyry, 
all being sparsely distributed in a schistose fels- 
pathic matrix. The individual pebbles are often so 
sheared that they show a succession of minute step- 
faults: where the pressure has been less severe they 
are generally deformed. They thus conform to the 
general type of Archean conglomerates in their 
scanty distribution through a sehisted felspathic 
and often chloritic matrix. They have, therefore, 
been claimed by glacialists as products of ice action ; 
but there is nothing in their distribution or in 
their internal characters that cannot be better ex- 
plained by invoking the assistance of large tropical 
rivers, such as the Irawadi and the Brahmaputra 
of the present day. 1 

Minor Areas 

The grits associated with the conglomerates are 
ordinarily felspathic and come therefore under the 
old definition of greywacke. Occasional flakes of 



biotite with derivative chlorite are also found. The 
general arrangement of the quartz and felspar is 
indicative of strong shearing. 

In addition to the broad Kurrawang area of sedi- 
ments, three others of minor importance and much 
more ill-defined are known. Their position may 
often be txaced only by the valleys that result from 
the lack of resistance offered by these rocks to the 
agents of denudation. They are all east of Kalgoor- 
lie, the first lying in the long valley that runs down 
to Hannan's lake along the eastern slope of the Kal- 
goorlie ridge. This valley was largely used as a 
source of salt-water supply before fresh water was 
brought to the goldfield from the coast, and several 
water-shafts are scattered along its length. Their 
dumps furnish no information, and the only good 
exposure is in the Phoenix quarry, north of 
Hannan's brewery. Even here the rocks have been 
so crushed and altered that a sedimentary origin 
cannot be postulated for them with certainty, and 
the valley has, as a matter of fact, been mapped 
as a sedimentary area largely by comparison of 
its weathering products with those of the undoubted 
sediments of the Kurrawang area. . 

Much the same would have had to be said for 
the second band of sediments near Kurramia, were 
it not for the fortunate discovery of a small band 
of scattered boulders and pebbles in a cutting on 
the wood line tramway about one and a half miles 
east of Kurramia station. In this area also the 
width of the sediments, about three miles, is indi- 
cated by the width of the flat valley bottom. The 
eastern boundary is extremely indistinct since, and 
especially along the Kalgoorlie-Kanowna road, the 
sedimentary beds appear to join the Kanowna 
sheared-porphyry area, the surface of which also 
tends to sink to valley bottoms. 

Secondary Sediments 

The third area of sediments lies to the northeast. 
Its western boundary appears to lie near Penny's 
Find, about ITY2 miles from Kurnalpi. Two miles 
farther east the road passes through a break in a 
low ridge, which, to the south of the road, shows 
beds of conglomerate rising to the top of the ridge. 
The pebbles of this conglomerate are chiefly basic 
amphibolite with banded jasperoid quartz, and are 
thus sharply differentiated from the conglomerate 
bands of the Kurrawang and Kurramia areas. The 
presence of basic amphibolite pebbles naturally 
raises the question of the age of the sedimentary 
beds, and since the amphibolite resembles the rock 
of the Older Greenstone rather than that of the 
Younger Greenstone, it is assumed that the sedi- 
ments are younger than the former, which is un- 
doubtedly the case. 

Younger Greenstones 

Under the general title of Younger Greenstones 
are included several rock species, which are, how- 
ever, regarded as representing successive segrega- 
tions from a single common magma. Their wide 
divergences as well as their close relationship is 
perhaps best indicated by the following table. For 
purposes of description, the intrusive dikes of por- 
phyrite and albite porphyry, though they do not 



July li>, lt»13 



MINING AND SCIENTIFIC PRESS 



!'7 



strictly eome under the heading of 'greenstonca, 
lire included hero : 



Probable original rock. 
1'ltra-baslc A. Peridot lie 
B. Pyroxenlte 
Basic c. Hornblende-dolerlte 

D. Oabbro or dolerlte 
8ubbaslo K. Quartz-gabbro or 
quarli dolerlto 



Intermediate F. Porphyrlte 
Acid G. Alblte -porphyry 



Ktirrawang valley to reappear much mora clearly 
defined, both in poaition ami in character, west of 



Now represented In the Held by: 
Serpentine, talr hi hist, coarse carbonate rock. 
Coarse hornblende rock. 
I.uatre-mottled amphlbollte. 
Epidiorite. 

1. Epidiorite with micropegmalll«. 

2. Chlorltlc rock with mlcropegniatlte (quaru-dolerlte greenstone). 

3. Bleached and curbonnted rock with mlcropegmatlte ('granite' of the 

miners at Kalgoorlle). 
Porphyrlte. . 
Alblte-porphyry. 



The younger aeid members are found intrusive 
into the intermediate and basic members of the com- 
plex. By far the most important member of the 
series, from an economic point of view, is the quartz- 
dolerite greenstone, so well developed in the Kal- 
goorlie mines, and, in its typically productive form, 
restricted, so far as examination has gone, to that 
area. 

Ultra-Basic Rocks 

The ultra-basic rocks have their greatest develop- 
ment in the neighborhood of Bulong. The serpen- 
tine arising from the alteration of the original rock, 
a peridotite, is often indicated, in the absence of 
rock exposures, by the magnesite boulders and frag- 
ments strewn over the surface of the soil. The 
long dike of ultra-basic rock running along the 
Boorara ridge and passing west of the Halfway 
hotel on the Kalgoorlie-Bulong road was thus first 
indicated. Nearer Kalgoorlie ultra-basic rocks oc- 
cur in the north end of the Kalgoorlie belt and also 
in some profusion east and northeast of Mt. Hunt 
(or Mt. Robinson, as it is locally termed) four miles 
south of Boulder. Another small area is found 
wesi of the true Mt. Robinson, which lies eight miles 
east-northeast from Coolgardie. These areas were 
originally mainly peridotites, but with them occa- 
sional patches of pyroxenite appear to be associated. 

The next group of rocks in this series includes 
quartz gabbro and quartz dolerite (diabase) now 
represented in the field by amphibolitic, epidiorite, 
and quartz-dolerite greenstone, the minor variations 
in rock features represented by the three latter types 
arising from slight original differences (generally in 
basicity) set up by segregation within a magma and 
also from differences in degree of later alteration. 
These rocks constitute, with the ultra-basic rocks, 
the great mass of the Younger Greenstones. Their 
greatest development is probably at Kalgoorlie, 
where the intrusive dike (the 'Kalgoorlie Dike') is 
1% miles wide. They occur normally as dikes in 
the Older Greenstones or in the sedimentary beds, 
and from this feature, which is best shown by the 
dike near Mungari and by its northward continu- 
ation in the Kurrawang valley, the relative ages 
of the two great series of greenstones is established. 

Gabbros 

The obviously gabbro members of the Younger 
Greenstones show remarkable persistence in direc- 
tion. Two main bands have been made out, the first 
lying along the Abattoirs ridge, west of Kalgoorlie, 
and the second passing through Mt. Monger. The 
first passes away to the south along the ridge south- 
west of Mt. Hunt: northward it dies away in the 



the Lady Bountiful. Farther north and a little dis- 
tance southwest of the Slippery Gimlet mine, the 
band shows a much fresher rock. Here the pyrox- 
enes are quite unaltered, and the structure is that 
of a normal gabbro. The second gabbro band is 
shown by the dark green band passing through 
Duplex and Simplex hills to near Mt. Monger 
township and so to Badalbi hill. This belt may be 
traced on the surface by its peculiarly dense vege- 
tation, carrying a low branching shrub that reaches 
a height of three to four feet and is not so seen else- 
where. 

The original dolerites (diabases) are not so strong- 
ly marked in the field as the gabbros. They form 
strong ridges, which are, however, not persistent. 
The}' now occur as epidiorite, or, if very much al- 
tered, as amphibolite. It may well be that in this 
group rocks of two ages are included, for certain 
dikes; for example, one crossing the road near the 
39-mile peg on the Kalgoorlie-Bulong road, have a 
north-south strike, while the regular strike of the 
majority of the bands is north-northwest to north- 
west. 

Some of these do not differ greatly from the 
country of the Kalgoorlie lodes, and probably would 
have resembled that exactly had they been wider 
and had thus greater opportunities for a more com- 
plete segregation of acid and basic components dur- 
ing cooling. The variations from the normal type 
on consolidation and the later changes induced by 
pressure and the passage of underground solutions 
will be fully detailed in later pages. 

Porphyrite 

The next member of the segregation series to be 
considered is porphyrite. This rock shows consid- 
erable variation in appearance when collected over 
a large area, ranging from dark gray to bluish rocks 
like diorite to light porphyrite rocks distinguishable 
with difficulty from felspar porphyry. They are all, 
however, characterized by the presence of notably 
large well shaped crystals of felspar. The felspar 
porphyries also show these large crystals, but do 
not contain the hornblende or the biotite (black 
mica) that are found in the porphyrites. Some vari- 
eties of porphyrite show little groundmass and few 
large felspar crystals; these are diorite-porphyrites. 
Others show a considerabe almount of groundmass 
with large crystals of felspar, hornblende, and bio- 
tite ; these are hornblende-porphyrites or mica-por- 
phyrites, as the hornblende show remarkable per- 
sistence as bands. The bands immediately west of 
Kalgoorlie may be traced southward by Feysville, 
and may be correlated with an obscure highly 



98 



MINING AND SCIENTIFIC PRESS 



July 19. 1913 



sheared rock lying on the plain east of Wolluba. 
This band reappears beyond the Kurrawang valley 
on the ridge east of Mt. Black Flag, and farther 
north broadens considerably. At the Slippery (iim- 
let mine the rich lode now being worked lies ill 
this rock, which is more easily recognized in the 
hand specimen as a porphyrite than under the micro- 
scope where the coarse structure is not apparent 
and the only name suggested for the rock is amphib- 
olite, a useful general term denoting merely a horn- 
blende rock and giving no clue to the nature nf 
the original rock. 

Other porphyrite areas are the neighborhood of 
the Majestic leases on the Randalls road; the coun- 
try of the Queen Margaret lode at Kanowna ; the 
Halfway Hill on the Gindalbic road; and near the 
12-mile peg on the Coolgardie-kunanalling road. 
The porphyrites weather badly and their limits 
are generally difficult, and often impossible, to trace. 
They, moreover, weather as to the west of Mt. 
Hunt, to a product resembling a decomposed highly 
felspathic grit, and in this state may readily indeed 
be confounded with the true sediments of the Kur- 
rawang series. It is also suspected that sheared por- 
phyry areas furnish much the same weathered 
product and in these cases there is considerable 
doubt as to the original character of the n.ck, 
whether sheared porphyry, sheared porphyrite. or 
felspathic grit. 

Albite-Porphyry 

Probably closely connected in origin with the 
porphyrites is the albite-porphyry (also termed 
soda-porphyry and felspar-porphyry), which occurs 
in narrow dikes, striking as a rule with the country 
in a general north-northwest direction. It is best 
known at Kalgoorlie and Kanowna, few exposures 
having been found outside those centres. Their gen- 
eral features will be described in detail when dealing 
with the Kalgoorlie field. In the vicinity of Ka- 
nowna albite-porphyry of two ages is known. ' A 
broad band of this rock has been crushed, brec- 
ciated, and occasionally mashed ; its occasionally 
rounded fragments have been regarded by several 
observers as pebbles and boulders in a conglomerate, 
while the southwestern mashed portion (above men- 
tioned) has been claimed as a felspathic grit giv- 
ing confirmatory evidence of sedimentary origin. 
The fragments are cemented by quartz. Through- 
out the whole band, however, there are only two 
kinds of fragments, albite porphyry and a sheared 
rock found near the northern boundary of the area 
and representing the basic greenstone which is de- 
veloped on that side. Finally there are no quartz 
pebbles in the band. Considerable light is thrown 
on the origin of this erujh-breceia by the Binduli 
quartz-porphyry dike, which on being followed 
southward into the lake country, passes graduallv 
from solid quartz-porphyry into a breccia in every 
respect similar to that at Kanowna. all stages o f 
the passage being obtainable. The Kanowna crush- 
breccia is penetrated by a broad albite porphyry 
dike, along the walls of which the main White 
Feather lodes have been developed. In this rock 
also the rich fiat quartz-veins of the Red Hill at 
Kanowna have been formed. 



Granite and Quartz-Porphyry 

It has already been shown that the Kalgoorlie 
area as described above forms a portion of a band 
of greenstones enclosed within granite. The great- 
est area of granite within the area is found in the 
southwest near Coolgardie, where the normally 
even N.NW.-S.S.E. boundary of the granite and 
greenstone is broken by long western tongues of 
greenstone brought into their present position by 
faulting along thrust planes. Tongues of granite 
are also intrusive into the mass from the south cross- 
ing the Red Hill road 10 and 15 miles southeast of 
Coolgardie. The granite is the normal biotite gran- 
ite. Its contact with the greenstone certainly does 
not dip flatly to the west, for a diamond-drill bore 
in the granite (in search of artesian water'), sunk 
from a point a little west of the boundary, reached 
a vertical depth of 2300 ft. without meeting green- 
stone. Near Black Flag there appears the south- 
ern termination of a tongue of granite that splits 
the greenstone band in two, the western portion of 
the greenstone running out to a point in the wide 
granite area near Davyhurst. A small granite area 
is present at Juglah. The granite rarely appears 
at the surface, but its presence may nearly always 
be assumed with certainty from the white sand 
thai its disintegration affords. Where it does ap- 
pear above the surface it furnishes the 'gramma' 
holes of the natives ; for regions that have not been 
visited in Western Australia the existence of large 
well defined gramma holes is assumed to be indica- 
tive of a granitic area. 

The quartz-porphyry dikes that occur within the 
greenstones are to be considered tongues or apo- 
physes from granite masses either now exposed to 
the east or west or concealed at great depths be- 
neath the greenstones. They are therefore most 
frequently found toward the margins of the green- 
stone bands; none are known in the immediate 
neighborhood of the Kalgoorlie mines. They are 
intrusive both through the Older Greenstones (at 
Coolgardie) and through the sedimentary beds (at 
Binduli). The largest area of quartz-porphyry 
known within the greenstones is perhaps that lying 
five miles northeast of Kanowna where the quartz- 
porphyry forms the bold hills overlooking the flats 
that were the scene of the 'Sacred Nugget' rush 
of bygone days. Another large area is in the neigh- 
borhood of Hunt 's old dam at Wongi, in the south 
of the area. These dikes may often be traced, like 
the granites, by the clean white sand they yield at 
the surface. 

Geological History 

The clearest view of the internal relations of the 
goldfield rocks may perhaps be obtained by recapit- 
ulating the geological history of the region, and, 
with the foregoing facts at command, it becomes 
possible to outline at least its salient features. 
Since all the important events in that history took 
place at a time inconceivably distant — perhaps 15, 
perhaps 25 millions of years ago — and since it was 
a period of great stress, during which some of the 
components of the rock complex lost or masked their 
identity, the history may err somewhat in the se- 
quence of minor events: that it is possible to re- 



July 11)13 



MINING AND SCIENTIFIC PRESS 



!I9 



construct any portion of its history in due to the 

fact that to its troubled youth til ere succeeded « 

long lift' of strongly contrasting quietude during 
which the region has gently oscillated — moving 
perhaps an inch in a century — in faint response to 
world stressing forces that have beaten with little 
effect against the great rock buttress on which the 
goldfields of Western Australia lie. One other such 
region there is in the world, so similar in its rock 
composition and in its life history as to suggest 
that it forms the northern portion of a province, of 
which the middle portion has disappeared beneath 
the waters of the Indian Ocean, leaving the south- 
ern Western Australian section still uncovered. It 
is the Deccan region of southern India, and its pre- 
vious examination has greatly assisted me toward 
the elucidation of the general problems afforded by 
the older rocks of Western Australia. 

There is, in the small area studied, no exposure 
of the ancient gneissic floor on which the oldest 
rocks were presumably deposited. These gneisses 
do occur far to the east of Kalgoorlie, and they are 
also, it is believed, brought up by block faulting 
in the neighborhood of Albany; they may there- 
fore be below the present surface, or, on the other 
hand, they may, and there is probability in the 
assumption, have been absorbed by later granitic 
magma as it 'stoped' its way toward the surface. 
That there were granitoid rocks is apparent from 
the pebbles in the conglomerate already described. 

Sub-Kalgoorlie Formation 

A broad granite area may therefore be imagined 
as the foundation on which the Kalgoorlie rock com- 
plex has been built up. Of its age, nothing can be 
said. It was before time, even as the word is under- 
stood in its geological sense, commenced to exist. 
It may indeed have been a portion of the funda- 
mental gneiss of the older geologists, conceived by 
them to be the original product of surface solidifica- 
tion on the cooling of the earth. Its origin is im- 
material, and further speculation concerning it is 
profitless. For long ages it lay bare in a world 
devoid of life, animal or vegetable, but at length 
there came an epoch that saw it shaken and riven 
by the forces of compression and tension that have 
molded the earth's surface; and up and through the 
fissures thus made, urged by the same lateral pres- 
sure or by the same release from overlying pressure 
that had induced the fissures, there welled a great 
lava magma that, emerging through volcani foci, 
covered the surface far and wide with lava flows, 
and, when much steam was present in the magma, 
with volcanic ashes. The first lavas were akin per- 
haps to andesite and basalt, and were succeeded in 
the natural order of the segregation of magmas, 
operating then, as now, by more acid lavas as tra- 
chyte and rhyolite. These rocks form the Older 
Greenstones. It is probable that the expiring effort 
of that cycle of igneous activity sent acid dikes 
(aplite, pegmatite, quartz, and felspar-porphyry) 
ramifying through the lavas and ashes; so much 
is indicated by the conglomerates of the sedimen- 
tary beds. The crushed and brecciated felspar- 
porphyry area of Kanowna may well belong to this 
period. After the solidification of these rocks earth- 



stresscs engendered fault luurea and thrust planes, 
the Ailing of which with silica and iron oxides gave 
rise, but only near the surface, to bands of jasper- 
oid rocks that rose to form the ridges of the coun- 
try. 

Erosion Agencies 

On these rocks, then, the rains and winds and 
rivers of that far-off time acted as they would act 
today, decomposing and disintegrating the surface 
and transporting the resulting d6bris to lower lev- 
els. Only in rare cases were the lavas sufficiently 
resistant to form and to remain pebbles; ordinarily 
they were broken to sand and triturated to mud. 
The boulders of the coarser sediments therefore rep- 
resent merely the harder ribs of the land; quartz- 
pebbles from quartz 'blows' and veins, banded jas- 
peroid pebbles from the jasper ridges, aplite, peg- 
matite, quartz-porphyry, and felspar-porphyry from 
the dikes that seamed the country, and finally a 
few granitic pebbles from the presumably more dis- 
tant granite mountains. These with much fine sand 
constituted the burden the great rivers carried 
toward the sea. The general facies of the sediments 
thus laid down indicates that the sea had not beer, 
reached within the Kalgoorlie area, but rather thai 
the region lay in the track of a great river, as the 
Ganges or Brahmaputra, and that it was. like them, 
subject to periodic floods. The sporadic distribu- 
tion of the conglomerate beds, together with the 
comparatively wide separation of individual peb- 
bles, point to a river changing its channel from 
season to season and so moving laterally across its 
plain, and to a situation near the embouchure of 
that river from a high mountain range. 

This concluded what may conveniently be termed 
the first stage in the geological history of the re- 
gion ; a great river plain had been formed, and 
from it there rose foothills of igneous rocks suc- 
ceeded by distant mountain ranges and peaks of 
granite, from the deep valleys of which a many- 
branched river ran to the alluvial plain. No aurif- 
erous lodes or veins had then been formed in the 
rocks, and their debris therefore carries no ancient 
'leads' or 'gutters'; whatever gold these Older 
Greenstones and sedimentary beds may carry, and 
it is little, is due to impregnation during a long 
subsequent epoch. 

Effect of Compression 

The region was now subjected to intense horizon- 
tal compression acting from E.N.B. to W.S.W. The 
horizontally bedded sediments and the then little- 
altered volcanic rocks were involved in the com- 
pression and were buckled into long low waves 
which became narrower from erest to crest until 
at length they were crowded on each other in in- 
tensely sharp folds, carrying far below in the bot- 
tom of the folds, the rocks that had originally been 
on the surface. The rocks have been crowded to- 
gether so closely that it is now impossible to say 
whether the five bands of Older 'Greenstone — name- 
ly, at Coolgardie, Kalgoorlie, Boorara, Balagundi. 
and the Bullock Holes — are five separate beds of 
lavas and ashes, or are merely preserved portions 
of one and the same series; the same may be said 
with regard to the four bands of sedimentary beds. 



100 MINING AND SCIENTIFIC PRESS July 19, 1913 

Railroads and Transportation Problems in Bolivia 



By G. W. Wepfeu 



This article is written primarily in the interest of 
mining engineers and prospective investors in Bo- 
livian mines, for the purpose of shedding some light 
on Bolivian conditions and the future possibilities 
of the mining industry in that country. Three suc- 
cessive presidents of Bolivia have been working for 
the settlement and peaceful development of the coun- 



Silver v. Tin 

The city*of Potosi was founded in 1545 and by 
1595, before the settlement at Boston, it had a popu- 
lation of 160.000 inhabitants. The ore in this locality 
is as rich as when mined by the Spaniards in the 
colonial days, and there is more of it in place today 




try. President Pando arranged the frontier dispute 
with Brazil, President Cornel Montes made peace 
with Chile, and President Villazon is at present 
following the same policy. Within the country 
there is a difference in elevation between the pampas 
of the east and the snow-covered peaks of the Cor- 
dilleras of more than 20.000 ft. The food products 
of the temperate and the tropical zones supply a 
great part of the population of the Andean plateau 
and the miners in the Cordilleras. Further railroad 
and river navigation facilities are required to carry 
the products for export to the ports of Antofagasta, 
Arica, and Mollendo on the Pacific and to Para. 
Buenos Aires, and Montevideo on the Atlantic, and 
will undoubtedly soon be furnished. 



than mined by the Spaniards. The silver ore is not 
mined as much as the tin ore, which the Spaniards 
had no use for, and had left in the mines. As tin 
at the present time pays better than silver, it is given 
the preference. In most parts of Bolivia the wages 
of the ordinary miner is 60c. per day, from which the 
miner buys his own food. In the barren parts of the 
country and where food has to be brought a long 
distance, as at Potosi, wages are much higher. The 
silver and tin concentrates from Potosi are carried 
by llamas to the Pacific coast in the same manner as 
they have been for the past 368 years. The llamas re- 
quire fifteen days to make the trip from Potosi to 
Uynni. The new railroad from Potosi to the station 
at Rio Mulatos on the Oruro-Antofagasta line, which 



July l!>. I!ti:i 



MINING AND SCIENTIFIC PRESS 



101 



will It- opened this year, will require nut more than 
12 or 15 hours for this trip. When this line is 
opened, provisions can be delivered cheaply at 
IVtosi which will result in a reduction in the high 
wagi-s als, i th<> If, i -lit charges to the const ports. 

Drilling is done entirely by bund tit the present, 
and if air, electric, or oil drills were introduced a 
great saving in the cost of mining would be effected. 
Distillate and crude oil can be obtained from the 
Peruvian side of Lake Titicaca. These improve- 
ments will result in a more profitable working of 
ores for gold, silver, tin, copper, antimony, bismuth, 
tungsten, wolfram, and other minerals. The tax on 
mineral lands is only 60c. per pertenencia (2.47 
acres) each 6 months. The export tax on metals is 
lc. per ounce of silver and 20c. per ounce of gold. 

Andean Plateau 

In sheltered parts of the Andean plateau are fer- 
tile valleys which abound in wheat, corn, fruit 
orchards, and flowers. Cochabamba, a city of 25,000, 
and Lucre, with 20.000 inhabitants, have beautiful 
parks and pleasant surroundings. The families of 
many of the mining engineers reside here. Some 
live on the farms, as the natives are kindly disposed 
toward foreigners. The hot springs at Colcha are 
sought by many as a cure for rheumatism. Savage 
Indians are still in the country, but it is hoped that 
by their association with semi-civilized Indians they 
will be gradually raised to a state of usefulness. 

Bolivia has an area of 59,721 square miles and a 
population of 2,500.000, including 240,000 savage 
Indians. The greatest part of the population are 
living on the Andean plateau and the eastern Cor- 
dilleras. 

The first railroad in Bolivia, which was built be- 
tween Antofagasta and Oruro by the Huanchaca 
Mining Co., was a 30-in. gage line and was splen- 
didly equipped. The continuation of this railroad 
with broad-gage track is called the Bolivia Railway 
Co., and runs from Crura, via Viacha, to La Paz. The 
trip from Antofagasta to La Paz is made in 48 hours. 
Passenger trains leave Antofagasta for the interior 
every Wednesday and Saturday at 6 : 40 p.m. The 
steamships, as a rule, arrive in the roadstead of Anto- 
fagasta in the forenoon of those days, which makes 
it possible for the passengers to leave by the evening 
trains for La Paz. La Paz lies in the deep cation of 
the La Paz river, about 700 to 800 ft. below the edge 
of the plateau. At a point above the city is the La 
Paz Alto station, the terminal of the steam cars. The 
train is subdivided into sections at this station and 
taken down the mountain to the city station by 
electric locomotives. The trains departing from 
La Paz city station are taken to La Paz Alto in sec- 
tions, where they are united to form the trains for 
Viacha and other points. La Paz is a city of 80,000 
inhabitants, and has electric power, electric light, 
street cars, and as good hotels as are to be found 
anywhere in South America. 

Results of the Nitre War 

In consequence of the unfortunate nitre war with 
Chile in 1879, Bolivia lost the provinces on the Pa- 
cific coast. While Peru also lost some of the sea- 
board, and keeps her animosity toward Chile, Bo- 



livia has come to an amii-nhli- undi-rtifaudiiig with 
Chile and made an nttrei-im-ul wlim-by Chili- is to 
build a railroad from the former Peruvian port of 
Arica to Viacha ou the line to La Paz, and ho give 
another outlet to the Pacifio coast. Work trains 
were running over the whole of this road last year, 
but the line has not yet been opened to gem-rat 
traffic. Trains will go from Arica to La Paz in 12 
hours. Passengers arriving at Arica during the day 
can leave the same evening and arrive at La Paz the 
following morning. The third connection of Bolivia 
with the Pacific coast is by rail from Viacha to 
Guaqui, a port on Lake Titicaca. Trains from La 
Paz leave early in the afternoon, arriving at the 
steamer pier in Guaqui at 6 p.m. Here the train is 
met by the fast twin screw steamer Inca, which 
crosses the lake and arrives at the Peruvian rail- 
road station Puno at 6 a.m. The journey is then 
continued across the western Cordillera. At Cru- 
cero an altitude of 14,666 ft. is reached and the 
train then speeds down to the port of Mollendo 
(Peru) making the trip from La Paz in about 30 
hours. The Peruvian Corporation, Ltd., of Lon- 
don and Lima, owns the railroad and steamer Inca, 
and has large locomotive and steamer repair shops 
at Arequipa. The Inca has good passenger accom- 
modations. This Company also has a concession 
from the Bolivian government to improve the Rio 
Desaguadero by conducting the surplus waters of 
Lake Titicaca to Lake Poapo. The Company has 
steamers and barges along this river to collect tin 
concentrate, silver, and copper, and to carry them 
to Lake Titicaca and thence to Mollendo. There 
is also the port of Chilalaya on Lake Titicaca, 
toward which point can frequently be seen large 
convoys of llamas, numbering from 100 to 1500, 
wending their way laden with concentrates. From 
Chilalaya the concentrates are shipped to the coast 
by the Peruvian corporation. 

River Navigation 

By the settlement of the frontier dispute between 
Bolivia and Brazil, Bolivia received £2,000,000, 
which sum was used to build a railroad around the 
rapids of the rivers Beni and Mamore on the Bra- 
zilian frontier. These two rivers unite at Villa 
Bella and form the Rio Madera (Madeira in Portu- 
guese). Near this junction there are 14 distinct 
rapids which prohibit navigation. These rapids 
have been navigated by rafts, and although the 
Indians have acquired much skill in handling them, 
the loss of life and merchandise is appalling, 
amounting to between 20 and 50% of the material 
transported. The tropical climate, together with 
every kind of fever and other disease, can only be 
compared with former conditions in Panama. In 
1870 a Philadelphia company obtained a concession 
to construct a railroad around these rapids, but 
failed. Below the rapids, the river is navigable for 
large steamers for more than 2000 miles to the city 
of Para at the mouth of the Amazon river. Above 
the rapids, the river Bemi is navigable as far as 
Puerto Pando, the railroad terminus from La Paz, 
and also up the Rios Mamore and Chimore to the 
railroad terminus of the Oruro-Cochabamba-Chi- 



102 



MINING AND SCIENTIFIC PRESS 



July 19. 1913 



more railroad. This railroad is now finished, and 
from Porto Velho to Guatara Merrim and Riberalta 
it is called the Madera-Mamore railroad, and is 
an American enterprise with headquarters in New 
York City. The greatest difficulty to contend with 
in the construction of this road was the climate. 
The Company has built at Porto Velho a model 
town and hospital. 

Present Railroad Situation 

The following table shows the railroad situation 
at the present time : 

Railroads in Operation in Bolivia 

Miles. 



Antofagasta to Oruro (within Bolivia) 574 

Oil ague to Oruro 303 

Oruro to Viacha (standard gage) 126 

Uyunl to Huancbaca 26 

Arica to La Paz (within Bolivia) 273 

Carafla to Viacha 125 

Branch line to Corocoro 5 

Railroads in Course of Construction 

Uyuni to Tupiza 120 

Rio Mulatos to Potosi 108 

Machamarca to Uncia 52 

Oruro to Cochabamba 119 

Railroads Projected 

Tupiza to La Quiacha 58 

La Quiacha to Trajai 131 

Potosi to Sucre 106 

Oruro to Carana 189 

Cochabamba to Chimore 124 

Cochabamba to Vinto 11 

Chimore to Puerto Valarde 77 

Cochabamba to Arani 45 

La Paz to Puerto Pando 158 

Puerto Acosta to Rurrenabaque 283 

Yacuiba to Santa Cruz 447 

Riberalta to Guajara Merrim 66 

Guajara Merrim to Velho 145 

Porto Velho to San Antonio 5 



The outlet from southern Bolivia to the east will 
be by way of Uyuni, Tupiza, La Quiacha. Jujuy. 
and Camposanto to Buenos Aires, and as soon as 
the line from Yacuiba to Embarcacion is built, this 
road will also be the outlet for the eastern part 
of Bolivia. Last year the line from Buenos Aires 
to Santiago was interrupted by snow for three 
months; passengers and mail had to go from Val- 
paraiso around South America to Buenos Aires. 
The Argentine line could keep the trains running 
to the tunnel, but the Chilean line could not keep 
their end of the road open. The Rio Pilomayo and 
the Rio Paraguay are large rivers and require but 
little improvement. They unite at Asuncion and 
form a continuous water route to Buenos Aires 
and Montevideo. 

Future Outlook 


With the completion of the railways which are 
now in course of construction and the lines which 
are projected, together with the opening of the 
waterways, access will be possible to parts of Bo- 
livia which to date have been practically inacces- 
sible. With reduced transportation charges and 
an outlet to the markets of the world, the mining 
industry will undoubtedly make great progress and 
the mineral wealth of Bolivia will attract more at- 
tention in the future than it has in the past. 



The Magnet Silver-Lead Mine, 
Tasmania 

By P. G. Tait 
•This mine is owned by the Magnet Silver Mining 
Co., and is situated on the slope of the Magnet range, 
some five miles from Waratah, on the old Corinna 
track, which crosses the Pieman 12 miles from the 
coast, and was the original outlet for the Zeehan 
field. In its early stages the Company trammed its 
products to the Corinna- Whyte river road, then 
carted it to the Emu Bay railway at Waratah for 
shipment to Bumie on the north of the island. To- 
day the mine is connected with the Emu Bay rail- 
way, near Waratah, by a substantial two-foot gage 
steel tramway, 10 miles in length. It is currently 
reported that this line, which cost $144,000, was 
built from the profits of a rich ore-pocket taken from 
No. 1 level. The scenery along this line is pictur- 
esque, and any visitors to Waratah would be amply 
repaid if they included this 10 miles in their tour. 
The railway cuts are studded with berries of vari- 
ous hues, and the fern gullies are really magnificent. 
The Company possesses two Koppel locomotives, and 
one by Krauss & Co., all of the articulated type, to 
negotiate the 99 curves on the route. 

The Mine 

The top workings of the mine consist of four 
adits, driven from the eastern slope of the range in 
a westerly direction, the lode being cut in 40 to 
350 ft. of driving. The lode traverses the eastern 
slope, bearing south 30° west, and consists of a gos- 
san formation from 1 to 30 ft. wide, rich in silver 
and lead, and carrying a little gold, with dolomite 
walls. The slate approaches close to the hanging 
wall on the north end, but is not seen on the south 
end of the worked portion of the lode. Near the 
surface the lode was worked by open-cut, and was 
rich in silver and lead. The Company made large 
profits out of this portion of the mine. The pres- 
ent workings of the mine are reached from No. 4 
level. An inclined shaft at an angle of 20° has 
been sunk to a depth of 480 ft. The hoisting station 
is 350 ft. from the mouth of the main adit, and is 
equipped with a hoist and two Cameron steam pumps. 
The cross-cuts, of which there are seven, are 65 ft. 
apart. No. 5, 6, 7, and 8 are depleted so far as the 
present ore-shoot is concerned, but there is no rea- 
son why payable shoots of ore would not be found 
if the levels were driven south beyond the break 
or fault which cuts off the ore. The gossan forma- 
tion, continued down to below No. 7 level in the 
central portion of the orebody, is being displaced 
on the north and south ends by dolomite. These 
levels were also rich in silver and lead, the gold con- 
tents diminishing with depth. The greater part of 
the mine's output is being produced from No. 9 
level, which has an approximate ore reserve of 15,000 
tons. 

The main shaft was sunk two levels, or 130 ft., 
below No. 9 level, and two stations cut, and the bot- 
•Abstraet from Mining and Engineering Review. 



July 1!', I'JM 



MINING AND SCIENTIFIC PRESS 



torn level. No. 11, was driven first, the foot-wall of 
the lode beiug cut ut 234 ft. from the shaft, when 
splendid ore wan opened. The cross-cut was then 
continued across the lode until the hanging wall wits 
reached, the lode measuring 60 ft. across. On the 
hanging wall a fine body of ore was cut 2 ft. in 
width. Prospecting drifts north and south of the 
cross-cut are being driven with excellent results, and 
the manager considers the prospects at this level 
are promising, and estimates that there is from 
10,000 to 15,000 tons of ore in sight. At No. 10 
the cross-cut was in 196 ft., and had just reached 
the foot-wall of the lode. Sullivan maehiue and 
hammer drills are used extensively. The air is sup- 
plied by a water-driven compressor. Since 1902, 
80.500 tons of ore has been exported. 

Concentrating Mill 

The ore is trammed from the mine and dumped 
onto a sorting-floor adjacent to a shaking-screen, 
into which it is shoveled in order to give a more 
even distribution on the shaker. All pieces below 
1% in. go direct to the mill, the larger pieces being 
fed onto a picking belt. The first-class ore and clean 
gangue are here separated, the middling going to 
a bin. thence to a 9 by 16 Blake crusher, where it 
is crushed to 1% in. and trammed to No. 1 mill-bin. 
From this it goes by automatic feeder to No. 1 
shaker. This has a screen with 3-in. square holes 
to catch any large pieces, chips, etc. All the under- 
size is fed to No. 1 rolls set a /2 in., thence by No. 
1 elevator to two lines of trommels screening to 
over % in., between % and % and %, % and 
3/16, 3 '16 and 3/64, and under 3/64 in. The 
screened ore is delivered to 10 two-compartment 
Harz jigs, which only make two products. The tail- 
ing (and over % i n -) join at a dewatering screen, 
% by 3/64-in. slots, delivering ore free from water 
to No. 2 elevator, and all the fine and water to a 
settling-box beneath. The fine is lifted by an 
ejector to a 3-in. slime pump, where it is joined 
by the undersize from the trommels. No. 2 elevator 
lifts the feed to a 100-ton bin, from there by roller 
feeder to No. 2 rolls set % in. Then it goes to 
No. 3 elevator, and to No. 4 shaker, giving over 
7/32 in., between 7/32 and 3/64, and under 3/64; 
over 7/32 in. going to No. 3 rolls, and thence back 
to No. 3 elevator; between 7/32 in. and 3/64 in. to 
four 5-ft. Bigelow grinding pans, thence to No. 5 
shaker. Under 3/64 in. goes to spitzkasten, where 
it joins the sand and slime brought up by a 3-in. 
pump, giving one spigot to No. 5 shaker and the 
overflow to five single spitzkasten. No. 5 shaker 
gives over 3/64 in. and under 3/64 in., the former 
going back to No. 3 elevator and the latter to one 
pair of 30-mesh Callow screens, giving oversize to 
two single-compartment May jigs, making heads and 
tailing. The undersize goes to one pair of 60-mesh 
Callow screens, giving oversize to two Card tables 
making heads, middling, and tailing; middling re- 
turned to No. 3 elevator; undersize of 60-mesh 
Callow screens to single spitzkasten, giving two 
spigots of two Card tables making heads, middling, 
and tailing; middling back to No. 3 elevator, 
overflow of spitzkasten to five single spitzkasten. 



uiving one spigot each to five Luhrig vauners, mak- 
ing heads, middling, and tailing; middling returned 
In No. 1 elevator, mid overllow to 1 1-eompartine'il 
spitzkasten, giving 11 spigots, and overllow to waste; 
11 spigots to one single spit/kastcn, giving one spigot 
and overflow to waste; spigot to one Luhrig van- 
ner giving heads, middling, and tailing: middling to 
No. 1 elevator. Dressing water is circulated by a 
6-in. ceutrifttgal pump, working at 1400 r.p.m. The 
ore is intimately associated with the gangue, making 
it undesirable to discard any tailing until it will 
pass 3. 64-in. mesh. 

Power Equipment 

The mill is driven by three IVltou wheels, work- 
ing under a 450-ft. head, No. 1 giving 67 hp. ; No. 2, 
86 hp.; and No. 3. 14 hp. It treats 50 tons per 
shift of eight hours. There is also a 10-drill Kelly 
vV: Lewis compressor, driven by a Peltou, and an- 
other for the lighting dynamo. All the Pelton wheels 
were supplied by local engineers and are giving 
very satisfactory service. An auxiliary steam plant 
in two units is available for use during the dry 
months. 

Accretion of gold in amalgamation, according to 
Allan J. Clark and W. J. Sharwood, consists in the 
building up of a crystalline layer of comparatively 
hard amalgam of appreciable thickness, which in 
extreme cases, as at the Drumlummon mill, may 
exceed Vs in. If the plate is strained by buckling, 
or by blows, the brittle sheet of amalgam can be de- 
tached in a more or less broken condition, leaving 
little but the film held by adhesion. Heating over 
a fire, or the application of steam or hot sand, softens 
the crystalline amalgam and facilitates its removal 
by a scraper. In the cold condition it is so hard 
that it is impossible to avoid gouging into the cop- 
per plate when removing it by a steel scraper. In- 
side plates show accretion to an extreme degree, the 
amalgam in some cases building up to a thickness 
of an inch or more. In the case of outside plates 
such a la}'er of crystalline amalgam forms an ex- 
ceedingly efficient, but somewhat expensive, medium 
for retaining the quicksilver or soft amalgam which 
is requisite to catch the finer gold from passing pulp. 
One of the principal objects of electro-plating is to 
provide a cheaper medium; unburnished electro- 
deposited silver forms a porous coating easily 
penetrable by mercury, in which respect it differs 
from rolled copper. A coat of silver has a minimum 
thickness of about 0.001 in. for every troy ounce of 
silver deposited per square foot, but the rough coat 
obtained in practice is considerably thicker. 

Production of raw iron in Germany during May 
1913 surpassed all previous records. The total out- 
put amounted to 1,641,600 metric tons, as compared 
with 1,587,300 in April 1913, and 1,492,157 in May 
1912. The various sorts produced during May were : 
foundry pig, 309,892 tons; bessemer, 29,406; 
thomas, 1,049,524; steel and spiegel, 207,227; and 
puddle, 45,551. 

Coke output of Alabama in 1912 was 2,975,489 
short tons, valued at $8,098,412. 



104 



MINING AND SCIENTIFIC PRESS 



July 19, 1913 



Tailing and Ore Treatment at Broken Hill 



•The Zinc Corporation, Ltd., operates a flotation 
plant for treating tailing acquired from mines in the 
district, and a concentrating plant for treating ore 
from the South Blocks mine. 

Zinc Concentrator 

During the year 345,425 tons of tailing was treat- 
ed, averaging 14.41% zinc, 6.94 oz. silver, and 5.5% 
lead, yielding 85,354 tons of zinc and 10,881 tons 
of lead concentrate. These products, at the aver- 
age prices of metals for the same period, were worth 




ZINC corporation's flotation plant. 



£449,047. A by-product, in the form of zinc slime, 
was also saved and stored for future treatment, 
which, if valued on the basis of a previous sale, 
would yield £14,989. It is hoped that results ob- 
tained from trials of the Horwood process, which 
indicate an increased revenue from this material, 
will be achieved on a working scale. 

The recovery of metals in the various products 
was as follows: 

Zinc, Silver, Lead, 
per cent, ounces, per cent. 

Contained In zinc concentrate 80.9 44.7 

Contained in lead concentrate 14.6 32.8 

Contained in zinc slime 4.8 6.3 4.6 

The recovery of lead in the zinc concentrate was 32.8%. 

The greatly improved metallurgical work now be- 
ing achieved is apparent when it is observed that 
the grade of zinc in the material drawn from the 
dumps has dropped from 19.1%, the average milled 
by a former process, to 14.41%, the average for the 
period under review. The grade of silver is now 
about 1 oz. per ton less than formerly, while the 
grade of lead remains the same. Although the ma- 
terial treated during the greater portion of the 
period has been refractory, owing to many of the 
dumps being highly oxidized, it is gratifying to 
record the fact that the grade of zinc and lead con- 
centrates has been improved beyond that for any 
previous period. The zinc»reeovery has been main- 
tained, while the distribution of the lead recovery 
has been improved to the extent that, whereas by 
the former process the proportions were 40.6% in 
the zinc concentrate and 29.6% in the lead concen- 
trate, the proportions for the period under review 
are 32.8 and 32.8%, respectively, a desirable alter- 
ation when it is considered that practically no pay- 

•Abstract from the annual report of the Zinc Corporation, 
Ltd. 



ment is made for lead in the zinc concentrate. 

The year's production of flotation concentrate 
before being re-treated by 'tabling' totaled 102,355 
tons, assaying 43.9% zinc, 13.1 oz. silver, 12.9% 
lead, equal to a sterling value, based on metals at 
the average prices for the year 1912, of 69s. 5.2d. 
per ton of flotation concentrate. 

Re-treatment by tabling was responsible for sep- 
arating this product into : 

Zinc, Silver. Lead, 
per cent. oz. per cent. 
85,354 tons zinc concentrate, assaying. 47.2 12.5 7.4 
10,881 tons lead concentrate, assaying. 14.8 32.2 57.9 

The sterling value of these products was 87s. 8.9d. 
per ton of flotation concentrate, the enhancement 
as the result of re-treatment being £93,685. As the 
cost of re-treatment amounted to £16,089, the profit 
was £77,596. In addition to the zinc and lead con- 
centrates, a by-product consisting of zinc slime was 
saved and stored for re-treatment (by the Horwood 
process) ; this by-product amounted to 5971 tons, 
assaying 38.7% zinc, 25.15 oz. silver, and 14.9% 
lead, and which, valued on the basis of previous 
sales, less cost of shipping, would realize a further 
£14,989. The re-treatment operations for the pe- 
riod (including the by-product zinc slime) thus show 
a total net profit of £92.585. The sulphuric acid 
plant worked steadily during the period, and pro- 
duced 4325 tons of acid. 

The working costs ranged from 8s. lid. to 10s. 3d. 
per ton, the average being 9s. 1.79d., a reduction 
as anticipated on the average for the previous pe- 
riod. The comparatively high cost of 10s. 3d. in- 
curred in December (the next highest figure being 
9s. 3d.) was due to the usual interruption to oper- 
ations caused by the Christmas holidays ; advantage 
being taken at the same time to effect outstanding 
repairs. 

Plant Construction 

Two Babcock and Wilcox boilers, a Bellis Morcom 
steam-driven air-compressor for supplying com- 
pressed air to the mining department, and a British 
Thompson-Houston 500-kw. mixed-pressure turbo- 
generator, complete with an up-to-date condensing 
plant, are being added to the power-plant. 

It was found necessary to build extra vats, and 
so add to the storage capacity of sulphuric acid 
to hold the extra amounts produced during the win- 
ter months, and insure a supply for the mill in the 
event of a break-down of the acid plant. The total 
storage capacity is now 470 tons. In order to re- 
duce the distance of belt conveying the residue, and 
to take advantage of the natural fall of the ground 
between the zinc concentrator plant and the residue 
dump, a sluicing and dewatering scheme has been 
installed, which has effected a considerable saving 
in belting and power. 

In consequence of the favorable results obtained 
in the laboratory by using the Horwood process on 
zinc slime, and the results obtained from the 100- 
ton parcel of ore roasted in the Edwards furnace 
at Bnllarat. Victoria, and afterward treated in the 



July 19, l'J13 



MINING AND SCIENTIFIC PRESS 



100 



local experimental plant , it was decided to install 
a working unit of this process for the treatment of 
ziuo slime. A plant for this purpose is now being 
erected, and good progress has been made with its 
construction. 

Lead Concentrator 

The mill ran 269 days for the period, treating 
138,284 tons of ore, or an average of 514 tons per 
day. The ore averaged 15.3% lead, 2.57 oz. silver, 
and 9.16% zinc. This tonnage produced 25,227 tons 
of lead concentrate assaying 6.28% zinc, 9.05 oz. 
silver, and 67.34% lead, in addition to which 36,800 
tons of zinc middling was produced assaying 17.15% 
zinc, 1.8 oz. silver, and 5.22% lead. At the average 
price of metals for the year, the concentrate was 
worth £214,335, and the estimated two-thirds profit 
on 36,680 tons of zinc middling dealt with by the 
treatment department, and based on same metal 
prices, amounted to £19,820. The extractions ob- 
tained were as follows: 

Zinc, Silver, Lead, 
per cent, ounces, per cent. 

According to lead concentrate 64.34 80.0 

According to zinc middling 49.8 19.0 9.1 

The extraction of zinc in the lead concentrate 
was 12.5%, but being of no financial value, is omit- 
ted from the above statement. Milling operations 
have throughout the year given satisfactory results. 

The erection of additional tables, storage vats, 
and connection of the latter with the railway sys- 
tem, has been completed. This has given greater 
facilities for working, and has enabled the plant to 
make clean quartz tailing and simultaneously in- 
crease the production of zinc middling; the latter 
product being sent to the zinc plant for further 
treatment. 

Following a number of successful small labora- 
tory experiments with the Lyster selective process 
(the invention of the mill foreman, James Lyster), 
a small experimental unit was erected at the lead 
mill for the purpose of treating a quantity of slime 
on a working basis. The results obtained from this 
small unit gave such a profitable recovery of lead 
and silver that it has been kept in continuous oper- 
ation, treating the bulk of the current production 
of slime. A full working unit for the treatment of 
the current and accumulated slime has been de- 
signed, and its erection will be put in hand at an 
early date. 

The 75-stamp mill of the Lake View & Star mines, 
Kalgoorlie, worked 8028 hours in 1912, crushing 
212,606 tons of ore, the duty being 8.47 tons per 
stamp-day. Concentrate saved amounted to 19,074 
tons, yielding 32,715 fine ounces of gold and 757 oz. 
of silver, while the slime produced, 193,532 tons, 
yielded 26,396 fine ounces of gold and 5297 oz. of 
silver. 

A hydro-electric power-station is now being 
equipped at Laufenburg, on the Rhine, which will, 
when completed in 1914, be the largest plant of its 
kind in Switzerland. The installation will com- 
prise 10 turbines, each coupled to a 5200-kw. 3- 
phase alternator, generating 6000 to 6600 volts, to 
be subsequently raised to 47,000. 



Workmen's Compensation 
Problems 

By II. W. Qahthbll 

There are two main divisions of mining law ; the 
first is concerned with the acquirement and hold- 
ing of mineral lands, and the second with the con- 
trol of mining operations, dealing particularly with 
the safety of the workmen. A great deal haB lately 
been heard about the first part of Australian mining 
laws, but the second part is also well worthy of 
attention. 

A very interesting case recently occurred in South 
Australia. It appears that a man working in a 
quarry was seen to place a drill in a partly charged 
hole ; his partner struck the drill with a hammer, 
an explosion followed, and the men were killed. The 
explosive used was 'rack-a-rock,' which was cut in 
pieces before being put in the hole. The depend- 
ents sued for compensation under the Workmen's 
Compensation Act. 

Summary of the Law 

The law may be summarized as follows: (1) The 
part of the mining law in question applies to quar- 
ries on private or Crown lands. (2) An accident 
is regarded as prima facie evidence of the owner's 
negligence. (3) The general rules, which must be 
observed as far as reasonably practicable, include : 
"No iron or steel pricker shall be used" and "In 
no case shall an iron or steel drill be used for the 
purpose of drilling out a charge which has missed 
fire." (4) A mine manager, who contravenes or 
does not comply with the general rules, is liable to 
a penalty of $500, unless he proves that he has 
taken all reasonable precautions to prevent such 
contravention or non-compliance. Further, a print- 
ed copy of the general rules shall be posted in the 
office and in some conspicuous place in every mine. 
(5) The Workmen's Compensation Act provides for 
compensation up to $1500, unless there has been seri- 
ous and wilful misconduct on the part of the work- 
man. 

It is interesting to note, though it has nothing 
to do with this case, that the contraction of lead, 
mercury, phosphorus, or arsenic poisoning, or of 
ankylostomiasis is regarded as an accident. 

Accepting the supposition that before the hole 
was completely charged a pebble became jammed 
in it above the explosive, and that the men were 
attempting to break this pebble, the discussion first 
centres on such a procedure. The witnesses dis- 
tinguished two cases : When the pebble is less than 
two feet above the explosive, it was generally ad- 
mitted correct to continue charging and to expect 
to detonate the first portion of the charge. When 
the pebble is more than two feet above, four meth- 
ods were then offered: (1) As above, but one may 
be permitted to doubt if detonation would often 
be obtained; (2) to break the pebble by means of 
half a stick of powder; (3) to drill or jump out the 
■pebble; and (4) to drill a new hole alongside. 

The discussion on this interesting contingency 
seems to have been generally avoided by legislators 



106 



MINING AND SCIENTIFIC PRESS 



July 19, 1913 



and writers. Method (1J may be ruled out; method 
(3) was said to have been so frequently used by 
so many, and even when the sides of the hole were 
almost certainly smeared with explosive, that lay- 
men might reasonably think it fairly safe. Prob- 
ably most engineers would restrict themselves to 
the second and fourth methods. The second no 
doubt answers in many cases; it is quick and simple, 
but runs the risks of ruining the hole without ex- 
ploding the charge or of exploding the charge so 
feebly that little rock is displaced and the face 
is put in bad shape. The fourth method is safe and 
certain, but expensive, and probably is little used 
unless experience has shown that the rock in ques- 
tion is likely to give poor results with the second 
method. Since one individual's experience of such 
cases is usually limited, this is a matter on which the 
experience of others would be very acceptable. 

Workman's Position 

The next question is, what is the position of a 
workman who breaks the law? This question was 
not raised, but probably it may be assumed that 
a workman is not supposed to know the law unless 
it is formally brought before his notice, and that 
if it is so brought, disobedience would be regarded 
similarly to disobedience to his superiors. 

The words "serious and wilful misconduct" nat- 
urally offer a fruitful field for discussion. These 
words occur also in the English act, so naturally 
the English interpretation bears great weight. 
Briefly, it may be stated that the word "serious" 
applies to the misconduct and not to the conse- 
quences, and "wilful" is to be taken to mean de- 
liberate and not to apply to acts done on the spur 
of the moment. Prom this it follows that unless 
an act is notoriously dangerous, that is to say, 
would be regarded thus by most of his comrades 
in a position to judge, a workman committing it 
has not been guilty of serious misconduct, and that 
there is an important difference in seizing a handy 
tool and going deliberately to fetch a similar tool. 

In the case in question, it appears that the mis- 
conduct was legally wilful but not legally serious, 
for the majority of the workmen witnesses said that 
the act was customary. 

Finally, although no appeal was made, it appears 
that in such a case the higher court would have 
decided not whether the judgment was correct, but 
whether the judge might reasonably have found as 
he did. 

The Court's Decision 

The judgment, which was wholly in favor of the 
workmens' dependents, contained several interest- 
ing points: "The burden of proving the miscon- 
duct, and that the injury was caused by it, is on 
the respondents, and they must prove it affirmative- 
ly and not by surmise. The evidence is conclusive 
that at the time of the accident the two men were 
engaged at their work, and it is sufficiently clear 
that the steel drill was used, but the proximate 
cause of the accident was not conclusively shown." 
The importance of this general statement is quite 
independent of the fact that many mining engi- 
neers would regard the proximate cause as conclu- 



sively shown. With regard to the fact that no defi- 
nite rules were laid down and that the method ad- 
vocated in court was not followed, "The quarrymeu 
had a free hand to use their own judgment, based 
upon their own experience, and broke no rule." and 
"If employers require such methods to be followed, 
it entirely rests on them to make proper rules for 
enforcing*them." 

Here then we have a remedial statute designed 
to help the workman without putting new obliga- 
tions upon him, and really doing so. 



Improvement of Miners' Surroundings 

The United States Bureau of Mines is about to 
investigate the conditions under which a miner 
works, believing that the unsanitary conditions 
which exist in some of the mines, as well as in some 
of the mining towns, are a factor in the death rate 
among the men. It is intimated that these condi- 
tions not only unnecessarily cause the death of min- 
ers through disease, but they are often responsible 
for accidents which might not have happened if the 
miners were in perfect health. 

The Bureau has organized what is known as the 
Mine Sanitation Section, in charge of J. H. White, 
engineer, and hopes to bring about progress by ap- 
pealing to the miner, the manager, and the owner, 
showing that all three can assist, and be benefited 
by good sanitary conditions. It will reach the miner 
by means of illustrated lectures, moving-picture ex- 
hibits, and pictorial circulars. These will show how 
sickness and suffering are spread by careless habits, 
and will drive home the importance of personal and 
household cleanliness. 

Conditions Peculiar to Mining Towns 

Mr. White, in talking about the conditions which 
exist in mining towns, said: "The mining town 
does not grow, but is built at a single stroke. The 
effect of this is that the valuable lessons learned 
by the 'try-out' method and the profit gained by 
previous mistakes do not exert their powerful in- 
fluence, so that the errors existing in one house 
exist in all ; if one house is not properly lighted, 
none of the houses will be properly lighted j if a 
few houses are placed too closely together, all houses 
will be similarly spaced ; if there is congestion in 
one section, there will be congestion throughout. 
Of course, one could have learned from the experi- 
ence of other mining towns already built, but this 
information was perhaps not readily available, and 
local conditions modify each case. 

' ' One of the first investigations which the Bureau 
intends to take up is the house problem, with a 
view to putting before the miners the best prac- 
tices and the ones which have stood the tests of 
time. 

"The company ownership is the most important 
factor entering into housing conditions. Every 
house reflects the standard which the operator 
wishes to maintain. It is difficult to stimulate a 
personal pride